Footnote management for display and printing
This is a continuation of application Ser. No. 378,936 filed May 17, 1982, now abandoned. 
    
    
     CROSS REFERENCE TO RELATED APPLICATIONS 
     Commonly Assigned U.S. application Ser. No. 378,944 entitled Footnote Formatting, having J. T. Repass et al. as inventors, and filed concurrently herewith. 
     Commonly Assigned U.S. application Ser. No. 378,929 entitled Designation of Footnotes and Footnote References, having J. T. Repass et al. as inventors, and filed concurrently herewith. 
     Commonly Assigned U.S. application Ser. No. 378,946 entitled Footnote Assembly Management, having V. Cuan et al as inventors, and filed concurrently herewith. 
     TECHNICAL FIELD 
     This invention relates generally to footnoting documents, and more specifically to a method of, and system for, managing numbering of footnotes and footnote references during input, updating, and document assembly. 
     BACKGROUND ART 
     Footnoting of a document such as a legal brief, book, manuscript, etc. is a well known technique of providing both uncluttered and smooth flowing information and thoughts, and background or supporting detail to a reader at different locations within the documents. The smooth flowing information is the body text of a document, and the supporting detail is made up of footnote text. In constructing such a document, efficient management has always been an elusive skill. This was so when documents were handwritten, and still presents a significant economic and throughput burden today. This is so even with the availability of flexible keyboard/display word processing systems. 
     During the handwritten document era, footnote number management was a major problem which required a great deal of writer attention. Simple numbering of footnote references and footnotes, standing alone, was fraught with problems. An author in referencing a footnote could readily apply an appropriate number to both a reference point and corresponding footnote if the number for a prior reference and footnote were recalled or on the same page. However, a loss of recollection and an absence of a prior same page number required either a note pad and pen or leafing through previously prepared pages. Obtaining a final inked copy with a minimum number of drafts required particular writer attention. Editing of inked copy was unacceptable, if not impossible. Paint and lift-off compositions are more modern day conveniences. 
     The above mentioned problems have not yet been suitably addressed. One system on the market today provides for footnote management upon printout. With this system, an operator can prepare a footnoted document in one pass, but particular operator attention is required. During preparation, body text is keyed to a body text frame up to a reference point, a footnote reference number is keyed, a footnote frame is called, a corresponding footnote number is keyed, text for the footnote is keyed, and then the body text frame is recalled. Body and footnote text are stored separately. The footnote text is stored in a footnote library for later recall. Following document preparation, there is an opportunity to separately review and edit the body and footnote text, but there is no opportunity to display review and edit an assembled document prior to printing. That is, the first opportunity an operator has to view an assembled document is following printing. During printout, the system merges the body and footnote text. On the whole, planning and multiple drafts are reduced, and preparation is in a logical manner. Even so, glaring editing disadvantages still exist. The most notable is that the ability to efficiently edit and/or make changes is severely restricted. An example of a result of a simple editing attempt is loss of correspondence between footnote reference numbers and footnote numbers if footnotes are to be added, intermingled, repositioned, etc. Inserting a reference number among existing reference numbers requires a subsequent additional operation for renumbering all following reference numbers. This is also the case for footnote numbers if a footnote is to be inserted or deleted. Another disadvantage is the above mentioned attention that is required of an operator. An error in either a footnote reference number or a footnote number can either prevent later document assembly during printout, or require additional editing and printout. 
     From the above, modern day keyboard/display word processing systems, although beneficial in many respects, have not been structured and/or programmed to efficiently handle even rather simple numbering problems. For one thing, many envisioned approaches to handling even mundane author desires required programming and/or structure additions which would be prohibitive from a cost standpoint. With this in mind, any thoughts of providing for different types of numbers such as Arabic numerals and graphic symbols, and intermixing these types of numbering, have quickly been abandoned. This fact has not been diminished in any respect when a desire to reset numbering on a chapter basis has been considered. When these considerations are coupled with the fact that separately stored body and footnote text must be brought together with a reasonable per page correspondence between footnote references and corresponding footnotes, there has been a compounding of the envisioned tasks and problems. 
     The above described capabilities of penmanship and word processing systems are prior art to the extent that a semblance of a desired end result can be laboriously achieved. What has not been achievable though, is the flexibility to efficiently both meet author desires and manage numbering tasks from input to output. It is these deficiencies which cause the prior art to fall short of either anticipating or rendering the instant invention obvious. More specifically, the instant invention presents an advance over prior art systems and techniques in that on-line footnote/body text preparation capabilities are provided, automatic system reference/footnote numbering and updating are provided during both input and editing, and a capability of displaying a page to be printed is provided. 
     DISCLOSURE OF THE INVENTION 
     A unique method of, and system for, managing numbering of footnote references and footnotes from input to output is provided in order to reduce planning and multiple drafts, increase throughput, and remove normal editing restrictions. With this invention, an operator can input a footnoted document during a single pass. During input of the document, body text is keyed up to a reference number point. During this body text keying, the text is displayed and editing is permitted. At the reference number point, a reference control is keyed and a display frame is presented for keying the footnote. Editing of the footnote is also permitted. Following input of the footnote, the operator returns to the body text display frame for continued keying, and the footnote is stored away in a footnote library. The system automatically assigns corresponding numbers to the reference point and the footnote. Should later editing require number changes, this will be automatically taken care of by the system. Following input keying of the body and footnote text, operator procedure calls for causing the system to assemble the body and footnote text. The assembly operation involves combined merge and pagination operations. Following assembly, the document can be display recalled on a page basis for review and editing. Thereafter, the document is ready to be printed. 
    
    
     BRIEF DESCRIPTION OF THE DRAWING 
     FIG. 1 is a pictorial representation of a page of a footnoted document illustrating the handling of a partial footnote. 
     FIG. 2 is a pictorial representation of a succeeding page of the footnoted document illustrating the handling of two footnote references on a last line of body text. 
     FIG. 3 is a pictorial representation of yet another succeeding page of the footnoted document illustrating the handling of long footnotes. 
     FIG. 4 is a pictorial representation of a body text frame including inputted body text to the point of a footnote reference. 
     FIG. 5 is a pictorial representation of a footnote text frame including inputted footnote text to be referenced by the reference point in FIG. 4. 
     FIG. 6 is another pictorial representation of the body text frame shown in FIG. 4 having additional inputted body text to the point of second footnote reference. 
     FIG. 7 is a pictorial representation of a footnote text frame having inputted footnote text for the second footnote reference in FIG. 6. 
     FIG. 8 is a block diagram showing a word processing system used for performing the invention of this application. 
     FIG. 9 is a block diagram illustrating the makeup of the processor shown in FIG. 8. 
     FIG.&#39;S 10-18 are flow charts corresponding to Tables 1-9 in the following Best Mode for Carrying Out the Invention section of this application. 
    
    
     BEST MODE FOR CARRYING OUT THE INVENTION 
     General Description 
     For a more detailed understanding of the invention, reference is first directed to FIG.&#39;S 1 through 3. In these figures are illustrated pages n, n+1, and n+2 which can represent any three consecutive pages of a footnoted document. The solid lines represent body text and the dashed lines represent footnote text. 
     For purposes of the following explanation, it is to be assumed that each page contains 30 lines with the bottom four being dedicated to footnote text. Line numbers appear adjacent the left edge of page n in FIG. 1. In addition, it is assumed that Arabic numerals have been chosen for designating footnote references and footnotes. Yet another assumption is that page n is the first page of a document containing a footnote reference. 
     Now, it is to be further assumed that an operator is keying to a word processing system programmed and structured according to this invention, having a display sufficiently large enough to display any one of pages n through n+2, and that body text has been keyed or input to the point of footnote reference numeral 1 in page n. The keying of body text is to a body text frame 100 shown in FIG. 4. At the point of footnote reference numeral 1, a footnote text frame 101 shown in FIG. 5 is called and presented to the operator for keying or inputting footnote text for footnote 1 in FIG. 1. Also, the body text will be stored separately from the to-be-keyed footnote text. Upon completion of keying of the footnote text for footnote 1 in FIG. 5, the operator keys for recalling frame 100. At this time, the system will automatically store away the footnote text of frame 101 in a footnote library, recall frame 100, display the numeral 1 in frame 100, and await further operator keying of body text from the point of numeral 1 in frame 100. 
     Following keying to the point of footnote reference numeral 2 in FIG. 6, the operator calls for a footnote frame 102 shown in FIG. 7 for keying of the footnote text for footnote 2. Following the keying of footnote text for footnote 2 in frame 102, recall of frame 100 is again keyed, and the numeral 2 is displayed in frame 100 (FIG. 6). 
     The above operations are continued for all footnote and body text to the end of page n+2 in FIG. 3. 
     For purposes of further explanation, assume that the document input according to the above will consist of only the three pages illustrated in FIGS. 1-3. Following input, an assembly operation is required for merging the separately stored footnote and body text and for paginating the assembled document for ultimate printing. Performing the paginate/assembly operation will format the footnotes at the bottom of each page as shown in FIGS. 1-3 for both display and printing purposes. One advantage of this invention is that the operator may view exactly how the footnotes will appear with the body text prior to printing. 
     Another advantage is that the system handles all numbering chores automatically. This is so not only on input, but during any later editing involving insertion, deletion, repositioning of footnotes and footnote references. This is also regardless of any operator specified beginning numbering and any operator specified intermingling of the types of numbering. That is, an operator can specify any beginning number, and can later in the document switch to numbering with graphic symbols. 
     From the above, both Arabic numerals or numeric characters, and graphic symbols can be used for numbering. When numeric characters are selected, there will be an incrementing by one of an initially selected number for each following designation of a footnote or footnote reference. When graphic symbols are selected, there will be an increase by one in the number of symbols for each following designation of a footnote or footnote reference. 
     For example, the number 3 can be selected. If so, and from the above, the following designation will include the number 4. If two asterisks are selected as a beginning designation, the following designation will be three asterisks. This is since the system is programmed to sequence the designations. The system is also programmed to sequence intermingled designations. For example, if the order of designations is 3, 4, **, and ***, and the operator again calls for Arabic numerals, the next designation will be the number 5. In addition, an operator can specify a resetting of the numbering to that initially defined such that, for example, designations are chapter or page oriented. That is, footnotes and footnote references can be renumbered beginning with the number 1 at the beginning of each chapter or page of a book. 
     The footnote and footnote reference designations are initially defined by the operator specifying or selecting choices from a menu at the beginning of the job of document preparation. These selections will remain in effect until changed. Operator tasks of specifying and defining designations will be brought out in greater detail later in the specification. For now though, it is sufficient to note that flexibility is broadened greatly from any capability envisioned by the prior art. 
     Detailed Description 
     Refer next to FIG. 8. In this figure is shown a portion of a text processing system, including a processor 10 to which is connected a bus 12 leading from a keyboard 14. Character data generated by manual actuation of keys on keyboard 14 causes character related signals to be applied to processor 10. Processor 10 provides on an output memory bus 16 a data stream in which the characters selected by actuation of keyboard 14 appear suitably encoded. 
     Keyboard 14 is made up of a standard set of alpha/numeric graphic keys for keying characters, numbers, punctuation marks, and symbols, and also includes function and format control keys for causing and controlling a carriage return, indent tab, etc. In addition, the keyboard includes a second set of control keys for issuing special control commands to the system. These control keys are for controlling cursor movement, for setting the keyboard into a number of different modes, for use in conjunction with other keys for defining and controlling operations and other functions, etc. 
     Memory bus 16 extends to a memory unit 20 which is preferably a random access memory, to a display unit 22, to a diskette unit 24 and to a printer 25. 
     Included within memory unit 20 are two text storage buffers. One is a formatted footnote text storage buffer (TSB) 140 and the other a document TSB 240. The formatted footnote TSB 140 is used only by an assembly supervisor 100 when a limited footnote resolution algorithm is used to resolve and format footnotes at the bottom of a page. The document TSB 240 is used as a window into indefinite length text pages stored on a diskette usable by unit 24. Both assembly supervisor 100 and an editing supervisor 200 use the document TSB 240. 
     A footnote TSB control block 130 is linked to formatted footnote TSB 140 via a channel 132. A document TSB control block 230 is linked to document TSB 240 via a channel 232. 
     TSB manager 125 is linked by channels 124 and 224 to footnote TSB control block 130 and document TSB control block 230, respectively. 
     TSB manager 125 is linked by channels 134 and 234 to formatted footnote TSB 140 and document TSB 240, respectively. Editing supervisor 200 is linked via channels 220 and 222 to TSB manager 125. Editing supervisor 200 contains keystroke processing routines which are invoked based on the key pressed on keyboard 14. 
     In operation of the system of FIG. 8, a body text encoded data stream applied along memory bus 16 is stored in document TSB 240. In the process of correction and editing the contents of the body text in document TSB 240, selected portions or lines of a page are presented to the operator on display unit 22. 
     In addition to editing the contents of the body text, editing supervisor 200 may also create and revise footnotes within document TSB 240 in order that footnotes of indefinite length can be supported. 
     A menu manager 202 is linked via channels 112 and 212 to assembly supervisor 100 and editing supervisor 200, respectively, and is used when a menu is to be displayed. Menu manager 202 is linked via channels 216 and 218 to a menu buffer 250. 
     Assembly supervisor 100 is linked to TSB manager 125 via channels 120 and 122. Assembly supervisor 100 provides control routines necessary to execute an assembly operation for paginating and merging body text stored in document TSB 240 with formatted footnote text stored either in formatted footnote TSB 140 (if all of the formatted footnote text for the body text page will fit) or on a diskette. 
     Assembly supervisor 100 is linked to a footnote control block 108 via channel 106. Footnote control block 108 is used to store status information during the assembly operation for resolving and formatting footnotes. 
     Assembly supervisor 100 is linked to a footnote reference buffer 110 via channels 102 and 104. Footnote reference buffer 110 contains pointers to diskette stored footnote text which has not yet been placed at the bottom of a page or at the end of the document during the assembly operation. 
     Refer next to FIG. 9. In this figure are shown the details of processor 10 which is capable of performing the operations of this invention under program control. In practice, processor 10 includes an INTEL® 8086 Microcomputer chip. Typical logic hardware elements forming processor 10 include a control logic unit 70 which responds to instructions from memory 4 on bus 16. The control logic unit 70 is also in the data stream identified by the data and address bus 82 interconnected to various other logic units of processor 10. 
     In response to instructions from random access memory 4, control logic unit 70 generates control signals to other logic elements of processor 10. These control signals are interconnected to the various elements by means of a control line 72 which is illustrated directly connected to an arithmetic logic unit 73 and identified as a &#34;control&#34; line 72 to other elements of processor 10. Synchronous operation of the control unit 70 with other logic elements of processor 10 is achieved by means of clock pulses input to processor 10 from an external clock source on bus 74. This bus is also shown interconnected to various other logic elements of processor 10. 
     Data to be processed in processor 10 is input either through a bus control logic unit 76 or a program input/output control logic unit 77. The bus control logic 76 connects to random access memory 4 and receives instructions for processing data input to input/output control 77. Thus, input/output control 77 receives data from keyboard 6 while bus control logic 76 receives instructions from memory 4. Note that different storage sections of the memory 4 are identifiable for instruction storage and data storage. Device controls from processor 10 are output through program input/output controller 77 over a data bus 80. 
     Input data on the data bus 16 is passed internally through processor 10 on the bus 82 to control unit 70. Arithmetic logic unit 73, in response to a control signal on line 72 and in accordance with instructions received on memory bus 16, performs arithmetic computations which may be stored in temporary scratch registers 83. Various other transfers of data between the arithmetic logic unit 73 and other logic elements of processor 10 are of course possible. Such additional transfers may be to a status register 85, data pointer register 86 or a stack pointer register 87. Also in the data stream for these various logic elements by means of the bus 82 is a program counter 88. 
     A particular operating sequence for processor 10 is determined by instructions on bus 16 and input data on the bus 16 or on bus 80 from keyboard 6. As an example, in response to received instructions, processor 10 transfers data stored in scratch registers 83 to one of registers 86, 87, or 85. Such operations of processors as detailed in FIG. 9 are considered to be well known and understood by one of ordinary skill in the data processing field. A detailed description of each of the operations of the processor of FIG. 9 for the described invention would be counterproductive to an understanding of the invention as claimed. 
     Table 1 illustrates a routine used by processor 10 for soliciting operator input of footnote formatting information. 
     Table 1 is also shown in flow chart form in FIG. 10. The numbers in parenthesis in Table 1 correspond to the reference numerals in FIG. 10. 
     
                       TABLE 1                                                     
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FOOTNOTE FORMAT ROUTINE                                                   
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BEGIN (FN FMT)                                                            
INITIALIZE WORK SPACE AND CONTROL BLOCKS                                  
(300) COPY CURRENT VALUE OF ALL MENU OPTIONS (301)                        
INITIALIZE DFD (DYNAMIC FRAME DESCRIPTOR)                                 
WITH MENU OPTION VALUES                                                   
UNTIL MENU IS SUCCESSFULLY EXITED OR                                      
CANCELLED DO (309)                                                        
DISPLAY FOOTNOTE FORMAT MENU UNTIL MENU                                   
MANAGER (302) RETURNS                                                     
VALIDATE/COMPARE VALUES (303)                                             
IF THE &#34;CHANGE FOOTNOTE TYPING OPTIONS&#34;                                   
DIRECTIVE OPTION WAS SELECTED THEN (304)                                  
DISPLAY FOOTNOTE TYPING OPTIONS MENU                                      
AND SAVE (305)                                                            
OPERATOR INPUT FOR LEADING/TRAILING                                       
CHARACTERS AND &#34;FOOTNOTE CONTINUED&#34; TEXT                                  
ELSE                                                                      
IF A PARAMETER CONFLICT EXISTS THEN (306)                                 
POST OPERATOR MESSAGE (307)                                               
ELSE                                                                      
INDICATE FOOTNOTE FORMAT MENU HAS                                         
SUCCESSFULLY EXITED (308)                                                 
ENDIF                                                                     
ENDIF                                                                     
ENDDO                                                                     
FREE WORK SPACE (310)                                                     
RETURN (311)                                                              
END TABLE 1 (FN FMT)                                                      
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     FOOTNOTE FORMAT 
     If a &#34;Change Footnote Format&#34; option is selected in a Format Selection menu presented to the operator for any number of tasks, then the system displays a Footnote Format menu as shown in MENU 1 below. 
     The Footnote Format is a part of both the Document and Alternate Document Format of the document. The Document and Alternate Document Format are two independent sets of formats which the operator may begin using at the top of any page in the document. Unless specified otherwise, the system defaults to the Document Format. 
     
         ______________________________________                                    
MENU 1                                                                    
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Chg Document Fmt                                                          
                Brief      Ins                                            
DSK001                           Kyb 1 Pitch 12                           
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FOOTNOTE FORMAT                                                           
                    YOUR       POSSIBLE                                   
ID  ITEM            CHOICE     CHOICES                                    
______________________________________                                    
a   Typestyle Number           1-31 (10 Pitch)                            
                               80-111 (12 Pitch)                          
                               154-175                                    
                               (Proportional)                             
                               215-230 (15 Pitch)                         
b   Separator Character                                                   
                    --         Any available                              
                               character                                  
c   Number of Separator                                                   
                    20         1-450                                      
    Characters                                                            
d   Maximum Number of                                                     
                    48         1-999                                      
    Footnote Text Lines                                                   
    Per Page                                                              
e   Number of Lines  0         0-999                                      
    Between Footnotes                                                     
f   Footnote Numbering                                                    
                     1         1 = Document                               
                               2 = Page                                   
g   Footnote Numbering         Any available                              
    Graphic                    character, or none                         
h   Footnote Placement                                                    
                     2         1 = Document                               
                               2 = Page                                   
i   Change Footnote                                                       
    Typing Options                                                        
When Finished with this menu, press ENTER.                                
Type ID letter to choose ITEM; press ENTER:                               
______________________________________                                    
 
    
     Each ITEM in MENU 1 is briefly described below. 
     Typestyle Number: A plurality of choices of fonts including a variety of typestyles and pitches are available from MENU 1. Both typestyle and pitch are determined by a Font ID selected by the operator from POSSIBLE CHOICES. If no ID is specified, the system will use a Line Format typestyle default value. 
     Separator Character: Any graphic character available on a selected font can be specified or selected by the operator to form a separator line separating body and footnote text. 
     Number of Separator Characters: The operator can specify the number of characters to be used in making up the separator line. The number will only be measure limited. It is to be noted that a blank line will always precede and follow the separator line. 
     Maximum Number of Footnote Text Lines per Page: The number specified by the operator will be the maximum number of lines available at the bottom of the page for footnote text. Included with this number will be a specified number of lines between footnotes. Not included in the specified number are the blank lines before and following the separator line, the separator line, and a dedicated line at the bottom of the page. Although not included in the maximum number of footnote text lines, these lines are included in the total page line count. 
     Number of Lines Between Footnotes: The operator can specify the interfootnote line spacing for formatting purposes to improve aesthetics. Footnote text will always be single spaced. 
     Footnote Numbering: An operator can specify whether or not footnote numbering is to be reset at page boundaries. 
     Footnote Numbering Graphic: If footnote numbering is to be reset at page boundaries and a non-numeric graphic character such as an asterisk is specified, the first footnote will be numbered &#34;*&#34;, the second will be numbered &#34;**&#34;, etc. 
     Footnote Placement: The operator can specify whether or not footnotes are formatted and placed at the bottom of each page or the end of the document. Range: 1=Yes 2=No 
     Following selections from MENU 1 and depression of the ENTER key, a Footnote Typing Options Format menu will be presented to the operator. This is illustrated below as MENU 2 wherein choices are available for the fixed portions of both footnote and footnote reference designations. The type of the variable portions of footnotes and footnote reference designations is selected from MENU 1. 
     
         ______________________________________                                    
MENU 2                                                                    
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Chg Document Fmt                                                          
                Brief     Ins                                             
DSK001                           Kyb 1 Pitch 12                           
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FOOTNOTE TYPING OPTIONS                                                   
                    YOUR           POSSIBLE                               
ID  ITEM            CHOICE         CHOICES                                
______________________________________                                    
For Body Text:                                                            
a   Leading Characters                                                    
                    &#34;1/2 INX UP&#34;   Up to 8                                
                                   characters,                            
                                   or none                                
b   Trailing Characters                                                   
                    &#34;1/2 INX DOWN&#34; Up to 8                                
                                   characters,                            
                                   or none                                
For Footnote Text:                                                        
c   Leading Characters                                                    
                    &#34;1/2 INX UP&#34;   Up to 8                                
                                   characters,                            
                                   or none                                
d   Trailing Characters                                                   
                    &#34;1/2 INX DOWN&#34; Up to 8                                
                                   characters,                            
                                   or none                                
e   `Continued Footnone`                                                  
                    (Footnote Continued                                   
    Message Characters                                                    
When finished with this menu, press ENTER.                                
TYPE ID letter to choose ITEM; press ENTER:                               
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     An explanation of each ITEM listed in MENU 2 is set out below. 
     Leading Characters: These characters include both controls and graphics to be generated by the system immediately before the variable portion of the footnote and footnote reference designation both in body and footnote text. 
     Trailing Characters: These characters include both controls and graphics to be generated by the system immediately after the variable portion of the footnote and footnote reference designation both in body and footnote text. 
     `Continued Footnote` Message Characters: Any character, tab, indent tab, space, required space, required backspace, or word underscore can be selected for system placement (1) following the last footnote line on a page, and (2) before the first footnote line on the next page when a footnote &#34;spills over&#34; from one page to the next. 
     When the operator completes entry of all desired choices and depresses the Enter key against a prompt to type the ID to choose an item displayed on Prompt Line, the system will update the Document or Alternate Format of the document with the values selected by the operator and re-display the Format Selection menu. 
     Following the above set up routine, the operator is now ready to begin preparing a footnoted document. Footnotes are created during the normal Create/Revise Document task via a Footnote instruction. When the operator selects &#34;Footnote&#34; from an Instruction Menu and depresses the Enter key, a Footnote Menu illustrated below as MENU 3 will be presented. 
     
         ______________________________________                                    
MENU 3                                                                    
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Create Document                                                           
              Brief           Ins                                         
DISK01                Pg. 1         Ln. 13 Kyb 1                          
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FOOTNOTE                                                                  
                     YOUR        POSSIBLE                                 
ID   ITEM            CHOICE      CHOICES                                  
______________________________________                                    
a    Create/Revise   1           1 = Yes                                  
     Footnote Text               2 = No                                   
b    Reset Footnote Number                                                
     or Character                                                         
c    Document Name                                                        
d    Diskette Name                                                        
e    System Page Number                                                   
When finished with this menu, press ENTER.                                
Type ID letter to choose ITEM; press ENTER:                               
______________________________________                                    
 
    
     The ITEMS against which the operator makes choices are described below. 
     Create or Revise Footnote Text: Operator selection here is for calling a blank Footnote Typing Frame illustrated as FRAME 1 later herein if typing a new footnote is in order, or a Footnote Typing Frame with an existing footnote as illustrated in FRAME 2 later herein in order for the operator to make revisions. 
     Reset Footnote Number or Character: This option is selected whenever the operator desires to override the automatic system-generated sequence of footnote numbering or designations (i.e., 1, 2, 3, . . . ) by specifying a specific number or other graphic character or characters. 
     If a number is entered, then footnote numbering by the system will be reset to that value. If a graphic is entered, then the automatic sequencing of numeric values will be suspended until the next &#34;null&#34; or numeric value is encountered. 
     The following two items should only be selected if footnotes are to be stored in a document other than the editing document. 
     Document Name: Selection here is to (1) store footnote text to be created, (2) locate footnote text to be revised, or (3) locate existing footnote text to be included in the document. 
     Diskette Name: The name of the diskette on which the above document resides is entered by the operator. 
     System Page Number: An entry here is for calling a page which contains the footnote text. If both the Document Name and Diskette Name are blank, then the system will assume that footnote text is to be stored with the document being created or edited. The system will store the footnote text on the next available page on or above 9000 (i.e., 9000, 9000.0.1, 9000.0.2, . . . ) and after existing footnote pages. 
     If the operator specifies another Document Name/Diskette Name, then any page number of that document may be used to store the footnote text. If no page number is specified, then the first available page will be used. The operator may also specify that a particular existing page number be used by selecting this ITEM and entering the page number. 
     The Footnote Instruction thus created in memory will have the following makeup: 
     (1) Footnote Reference Control (FTR) followed by the following controls: 
     (2) Begin Formatted Text Control (BFT) 
     (3) Leading characters 
     (4) Footnote number 
     (5) Trailing characters 
     (6) End Formatted Text Control (EFT) 
     The BFT/EFT control pair is used by the system to identify data that was generated by the system and may be later updated or modified by the system. 
     The value of the footnote number itself may be: 
     (1) Sequentially assigned by the system when the footnote instruction is created (and prior to assembly for merging and paginating the footnote and body text). 
     (2) Explicitly assigned by the operator when the footnote instruction is created. 
     (3) Determined by the system during the assembly operation. 
     As a result, a footnote number (together with any leading and/or trailing characters) will always appear in the body text after a footnote instruction is created. 
     Upon revising a footnote instruction, the Footnote Instruction can be altered by placing the cursor on the Footnote Reference Control and pressing the Enter key. The Footnote Menu (MENU 3) will be recalled. 
     During creation or revision of footnote text, if &#34;Create or Revise Footnote Text&#34; is set to &#34;Yes&#34; in the Footnote Menu (MENU 3), a Footnote Typing Frame (Frames 1 and 2) will be displayed when the ENTER key is depressed. 
     
         ______________________________________                                    
FRAME 1                                                                   
(Footnote Typing Frame - Create)                                          
Create Footnote                                                           
            Brief                                                         
DISK01      Pg. 1     Ln. 13   Kyb 1  Pitch 12                            
______________________________________                                    
When finished, press ENTER.                                               
______________________________________                                    
FRAME 2                                                                   
(Footnote Typing Frame - Revise)                                          
Revise Footnote                                                           
            Brief                                                         
DISK01      Pg. 1     Ln. 13   Kyb 1  Pitch 12                            
______________________________________                                    
J. J. Vreeland, What to Look for When You Review                          
Programming Documents for Product Usability, Technical                    
Report TR03.124 (December, 1980); may be obtained from                    
the IBM Corporation, Santa Teresa Laboratory, 555                         
Bailey Avenue, P. O. Box 50020, San Jose, CA 95150.                       
When finished, press ENTER.                                               
______________________________________                                    
 
    
     The format of the footnote text and the page presentation characteristics for footnotes are determined by the Document or Alternate Document Format and the associated Footnote Format. After the footnote and body text have been assembled, the footnote text will always be single spaced regardless of the line spacing of the body text. The Context Field on the First Status Line of the Footnote Typing Frames will display either &#34;Create Footnote&#34; or &#34;Revise Footnote&#34;, as appropriate. 
     In order to create a reference to an already existing footnote, operator procedure is to specify the diskette name, document name, and page number for the footnote and set &#34;Create or Revise Footnote Text&#34;  to &#34;No&#34; in the Footnote Menu (MENU 3). 
     During document assembly, body text and footnote text are resolved. Resolution requires combined pagination and merge operations if both body and footnote text are to appear on the same page. 
     Footnote text is formatted for output to a display for review or to a printer by either a Paginate Document task, a Merge task, or a Paginate/Hyphenate option of a Check Document task. The Paginate Document task will assemble the document to permit the operator to view the pages of the document made up of body and footnote text exactly as it will be printed. 
     The makeup of the footnote text at the bottom of the page will be: 
     Begin Formatted Text Control (BFT) 
     Line Format Change (to set footnote format) 
     Begin Keep Control 
     Required Carrier Return (for blank line above separator line) 
     Separator line, Required Carrier Return 
     Required Carrier Return (for blank line below separator line) 
     Footnote Text 
     Line Format Change (to return to format prior to footnote) 
     &#34;n&#34; number of indent tabs (where &#34;n&#34; is determined from the indent level at the Begin Formatted Text control). 
     End Keep Control 
     End Formatted Text Control (EFT) 
     The footnote reference number or other designation in the body text will be used to determine the footnote number or other designation to be printed and displayed. The system will automatically insert footnote designations together with any leading and trailing characters at the beginning of the footnotes automatically during assembly only. 
     Ordinarily, the system will assign footnote numbers in sequential order. However, if the operator has specified that a particular number be used, the system will assign that number to the footnote, and subsequent system assigned numbers will be determined using that number as a base. 
     Automatic sequencing may be interrupted by the presence of non-numeric footnote reference designations. The next numeric footnote reference will resume the automatic sequencing by the system. 
     If footnotes are inserted, moved, or deleted from the assembled document, then the document must be reassembled to renumber the footnotes. 
     Table 2 describes the routine performed by the assembly supervisor 100. This is the main routine that controls the pagination and merge operations. This main routine (DOCPA) invokes other routines to adjust lines, make page ending decisions, and process, format, and renumber footnotes. 
     Table 2 is also shown in flow chart form in FIG. 11. The numbers in parenthesis in Table 2 correspond to the reference numerals in FIG. 11. 
     
                       TABLE 2                                                     
______________________________________                                    
BEGIN (DOCPA)                                                             
OBTAIN FORMATTING INFORMATION FOR                                         
DOCUMENT (315) INITIALIZE CONTROL BLOCKS AND WORK AREAS (316)             
GO TO STARTING PAGE                                                       
IF PRESERVE PAGE ENDINGS IS NOT INDICATED                                 
THEN (317) UNTIL END OF DOCUMENT OR CANCEL PRESSED DO                     
IF READJUSTING LINE AND A FOOTNOTE WAS (318)                              
ENCOUNTERED ON THAT LINE THEN                                             
INVOKE (FNNUM) - UPDATE/INSERT FOOTNOTE (319)                             
NUMBER IN BODY TEXT                                                       
ENDIF                                                                     
IF SPELL-ASSISTED HYPHENATION IS ON THEN (320)                            
PERFORM SPELLING-ASSISTED HYPHENATION WITH                                
LINE ADJUST (321)                                                         
ELSE                                                                      
PERFORM LINE ADJUST (322)                                                 
ENDIF                                                                     
IF THE LINE IS NOT TO BE READJUSTED THEN (323)                            
CALL (LINEPOS) TO DETERMINE IF LINE                                       
POSITION (324) CAUSES A PAGE END DECISION                                 
IF PAGE END DECISION THEN (325)                                           
DETERMINE LOCATION OF PAGE END (326)                                      
ELSE                                                                      
IF LINE END CODE IS A PE OR RPE THEN (327)                                
INDICATE PAGE END DECISION (328)                                          
ENDIF                                                                     
ENDIF                                                                     
IF PAGE END DECISION THEN (329)                                           
CALL (PAGEEND) TO INSERT A PAGE END AND (330)                             
INCREMENT THE POINT OF OPERATION TO NEXT                                  
PAGE                                                                      
ELSE                                                                      
INCREMENT PAST LINE END CODE (331)                                        
ENDIF                                                                     
ENDIF                                                                     
ENDDO                                                                     
INVOKE (EDOC) - FOOTNOTE END OF                                           
DOCUMENT (333) PROCESSOR                                                  
ENDIF                                                                     
CLEANUP AFTER TERMINATING PAGINATE                                        
CLEANUP FOOTNOTE PROCESSING                                               
FREE WORK AREAS (334)                                                     
END TABLE 2 (DOCPA) RETURN TO CALLER (335)                                
______________________________________                                    
 
    
     Table 3 describes a subroutine (LINEPOS) of the routine DOCPA. This subroutine calculates the positional change caused by line ending codes. The paginator (DOCPA) uses this information in determining where to make page ending decisions. The subroutine (LINEPOS) also invokes a routine (RSOLVE) to fetch and resolve footnote text. 
     Table 3 is also shown in flow chart form in FIG. 12. The numbers in parenthesis in Table 3 correspond to the reference numerals in FIG. 12. 
     
                       TABLE 3                                                     
______________________________________                                    
BGNPROC (LINEPOS)                                                         
DETERMINE LINE POSITION CHANGE (336)                                      
IF THE LINE END CAUSES THE LINE POSITION TO                               
CHANGE (337) THEN UPDATE THE LINE POSITION CHANGE BY THE                  
LINE (338) SPACING                                                        
SAVE LINE SPACING (339)                                                   
ENDIF                                                                     
OBTAIN THE LINE DENSITY FOR 1 LINE (340)                                  
SAVE THE LINE DENSITY FOR THE LINE SPACING                                
CALCULATE AND SAVE THE LINE POSITION CHANGE                               
AT THE END OF THE LINE (341)                                              
IF A FOOTNOTE REFERENCE WAS ENCOUNTERED ON                                
THE (342) LINE THEN                                                       
INVOKE (RSOLVE) - RESOLVE FOOTNOTE INTO THE                               
FOOTNOTE BUFFER (343)                                                     
ENDIF                                                                     
IF FOOTNOTE ROUTINE WANTS PAGE END DECISION                               
THEN (344) SET PAGE END DECISION (345)                                    
ENDIF                                                                     
ADD LINE POSITION ESCAPEMENTS TO PENDING                                  
FOOTNOTE ESCAPEMENTS (346)                                                
DETERMINE NUMBER OF LINES FROM BOTTOM OF                                  
PAGE DETERMINE NEW LINE POSITION                                          
ENDPROC TABLE 3 LINEPOS                                                   
______________________________________                                    
 
    
     Table 4 describes a subroutine (PAGEEND) of the routine DOCPA that makes page ending decisions by inserting a page end code into the document TSB 240. Prior to inserting the page end code, the subroutine (PAGEEND) invokes a routine (EPAG) to process and insert all footnote text accumulated in the formatted footnote TSB 140 or stored on diskette unit 24 into the document TSB 240. 
     Table 4 is also shown in flow chart form in FIG. 13. The numbers in parenthesis in Table 4 correspond to the reference numerals in FIG. 13. 
     
                       TABLE 4                                                     
______________________________________                                    
BGNPROC PAGEEND                                                           
IF THERE IS PENDING FOOTNOTE TEXT THEN (349)                              
INVOKE (EPAG) - FOOTNOTE END OF PAGE                                      
PROCESSOR (350) -ENDIF                                                    
IF NOT A PAGE END CODE THEN (351)                                         
INSERT THE PAGE END CODE (352)                                            
ELSE                                                                      
MOVE ACROSS PAGE END (353)                                                
EXIT IF END OF TEXT PAGES                                                 
MOVE TO START OF TEXT ON NEXT PAGE                                        
ENDIF                                                                     
IF PRINT INDICATED THEN (354)                                             
PRINT PAGE (355)                                                          
ENDIF                                                                     
ENDPROC TABLE 4 PAGEEND                                                   
______________________________________                                    
 
    
     Table 5 describes the routine (FNNUM) which determines the type of footnote numbering or designations to be used and when to reset and/or increment the numbering or designations. 
     Table 5 is also shown in flow chart form in FIG. 14. The numbers in parenthesis in Table 5 correspond to the reference numerals in FIG. 14. 
     
                       TABLE 5                                                     
______________________________________                                    
BEGIN (FNNUM)                                                             
IF FOOTNOTE REFERENCE RESETS THE FOOTNOTE                                 
NUMBERING (357) THEN                                                      
RESET THE FOOTNOTE COUNTER TO THE SPECIFIED                               
VALUE INSERT THE COUNTER INTO THE BODY TEXT (358)                         
ELSE                                                                      
IF THIS IS THE FIRST FOOTNOTE OF THE DOCUMENT                             
AND NUMBERING IS NOT BEING DONE ON                                        
A PER PAGE BASIS (359)                                                    
THEN                                                                      
SET THE FOOTNOTE COUNTER TO 1                                             
INSERT THE COUNTER INTO THE BODY TEXT (360)                               
ELSE                                                                      
INCREMENT THE FOOTNOTE COUNTER (361)                                      
IF THIS IS THE FIRST FOOTNOTE OF A PAGE AND                               
NUMBERING IS BEING DONE ON A PER PAGE BASIS                               
THEN (362) SET THE FOOTNOTE COUNTER TO 1 (363)                            
ENDIF                                                                     
IF FOOTNOTE GRAPHIC NUMBER IS NOT SPECIFIED                               
THEN (364) INSERT THE COUNTER INTO THE BODY TEXT (365)                    
ELSE                                                                      
SET I = FOOTNOTE COUNTER (366)                                            
DO UNTIL I = 0 (368)                                                      
INSERT FOOTNOTE GRAPHIC (367)                                             
I = I - 1 (369)                                                           
ENDDO                                                                     
ENDIF                                                                     
ENDIF                                                                     
ENDIF                                                                     
END TABLE 5 (FNNUM)                                                       
______________________________________                                    
 
    
     The routine RSOLVE in Table 6 is invoked by the paginator routine (DOCPA) if the footnote placement is specified to be &#34;bottom of page&#34; not &#34;bottom of document&#34;. If the footnote placement is specified to be &#34;bottom of document&#34;, then resolution occurs in the routine EDOC. Its function is to resolve one or more footnote reference controls that the paginator encountered after adjusting the cursored body text line during document pagination. Note that the paginator (DOCPA) invokes this routine only after completing the line adjustment of the cursored line and additionally determining that the cursored line will fit on the current page. This routine: 
     (a) insures that the footnote format values are in a range that will enable feasible resolution. These include the maximum number of footnote text lines, and the number of blank lines between footnotes, 
     (b) determines whether the current page is to be terminated prematurely. This occurs when the first footnote text line for the footnote reference that is being processed will not appear on the same page as its reference. This usually occurs when there is enough footnote text pending such that the maximum number of footnote text lines is surpassed, 
     (c) resolves the footnote references encountered on the current line via the invocation of routine GETFN to fetch and resolve each footnote reference. 
     Table 6 is also shown in flow chart form in FIG. 15. The numbers in parenthesis in Table 6 correspond to the reference numerals in FIG. 15. 
     
                       TABLE 6                                                     
______________________________________                                    
BEGIN (RSOLVE)                                                            
IF THERE ARE FOOTNOTES TO RESOLVE FOR THE                                 
CURRENT (375) LINE THEN                                                   
IF AT LEAST ONE MORE FOOTNOTE TEXT LINE                                   
WILL FIT AT THE BOTTOM OF THE CURRENT PAGE                                
BEING PAGINATED THEN (376)                                                
IF THE RESOLUTION ALGORITHM TO BE USED                                    
IS THE LIMITED TSB ALGORITHM THEN (377)                                   
INITIALIZE THE FORMATTED FOOTNOTE LIMITED                                 
TSB (378) INVOKE GETFN - RESOLVE/FORMAT FOOTNOTES ON                      
THIS LINE (380)                                                           
IF THE FORMATTED FOOTNOTE LIMITED TSB                                     
BECAME FULL THEN (379)                                                    
RESTORE POINT OF OPERATION TO THE FIRST                                   
FOOTNOTE OF THIS PAGE (380)                                               
RE-INITIALIZE PARAMETERS FOR THE FIRST                                    
FOOTNOTE OF THIS PAGE (382)                                               
INVOKE GETFN - RESOLVE/FORMAT FOOTNOTES ON                                
THIS LINE USING INDEFINITE LENGTH                                         
ALGORITHM (383) -ENDIF                                                    
ELSE                                                                      
INVOKE GETFN - RESOLVE/FORMAT FOOTNOTES ON                                
THIS LINE USING THE INDEFINITE LENGTH                                     
ALGORITHM                                                                 
ENDIF                                                                     
ELSE                                                                      
INDICATE PREMATURE PAGE TERMINATION DUE                                   
TO INSUFFICIENT ROOM AT THE BOTTOM OF THE                                 
PAGE FOR ONE MORE FOOTNOTE TEXT LINE (384)                                
ENDIF                                                                     
ENDIF                                                                     
RETURN                                                                    
END TABLE 6 (RSOLVE)                                                      
______________________________________                                    
 
    
     The routine GETFN in Table 7 is invoked by the routine RSOLVE to perform the actual resolution of footnote references. Its function is to resolve each footnote reference control that the paginator encountered after adjusting the cursored body text line. It is already assumed that there is room at the bottom of the page for at least one more footnote text line and that the footnote placement is at the bottom of page, and not at the bottom of document. 
     Resolution is performed one of two ways: 
     If all of the footnotes on a page can be copied and formatted into the formatted footnote TSB (140), then the limited footnote algorithm is used. This method does a minimal amount of diskette accessing and performs almost all processing in memory. The result is fast formatting and resolution of each footnote reference since all of the formatted footnotes will be in memory when the routine EPAG is called at the end of the page to insert the footnotes at the bottom of the page. 
     This method is used most of the time for footnote placement at the bottom of a page unless very large footnotes are being processed. 
     If not all of the footnotes on a page will fit into the formatted footnote TSB 140, then the indefinite footnote algorithm is used. This involves storing the current body text page back onto the diskette unit 24 and moving the TSB point of operation to the page that contains the footnote text to be formatted and resolved (even if the page is in another document). Once the footnote is formatted it is stored back onto the diskette and the TSB point of operation is moved back to its original point in the body text page. With this approach the routine EPAG will fetch the footnote text from diskette unit 24 to the bottom of the page. 
     Resolution typically involves the following items: 
     Formatting the footnote text based on the active footnote format. This implies that the Document or Alternate Document Format (whichever is active) will be scanned in order to obtain the parameters required to format the footnote text correctly. 
     Inserting the appropriate footnote number bracketed within a BFT/EFT control sequence with the appropriate leading/trailing text and/or controls prior to the footnote text. 
     Calculating the number of footnote text lines corresponding to the footnote reference being processed. 
     Updating the number of pending footnotes on the current line to be inserted. 
     Calculating the total vertical escapement due to footnote text that is to be inserted at the bottom of the page. This value is used by the paginator in its page ending decision logic. 
     Table 7 is also shown in flow chart form in FIG. 16. The numbers in parenthesis in Table 7 correspond to the reference numerals in FIG. 16. 
     
                       TABLE 7                                                     
______________________________________                                    
BEGIN                                                                     
OBTAIN ADDRESSABILITY TO THE FIRST FOOTNOTE                               
REFERENCE TO BE RESOLVED (385)                                            
UNTIL THERE ARE NO MORE FOOTNOTES TO BE                                   
RESOLVED DO (416) IF PERFORMING LIMITED RESOLUTION AND BLANK              
LINES (386) MUST BE INSERTED TO DELIMIT THIS FOOTNOTE                     
THEN INSERT THE BLANK LINES VIA PROGRAM                                   
SEGMENT BLANK --LN                                                        
ENDIF                                                                     
COPY THE FOOTNOTE TEXT INTO THE LIMITED TSB                               
AND DETERMINE THE NUMBER OF FOOTNOTE                                      
TEXT LINES VIA THE PROGRAM SEGMENT COPY --FN                              
IF PERFORMING LIMITED RESOLUTION AND THE                                  
ENTRY (410) COULD NOT BE RESOLVED SUCCESSFULLY THEN                       
INSERT INTO THE LIMITED TSB THE APPROPRIATE                               
ERROR MESSAGE (411)                                                       
ENDIF                                                                     
OBTAIN THE NUMBER OF LINES FOR THIS FOOTNOTE                              
(412) REFERENCE                                                           
CALCULATE THE VERTICAL ESCAPEMENT THAT                                    
WILL BE (413) GENERATED FOR THE FOOTNOTE TEXT LINES                       
CORRESPONDING TO THIS FOOTNOTE REFERENCE                                  
UPDATE THE TOTAL VERTICAL ESCAPEMENT FOR                                  
ALL (414) FOOTNOTES ON THIS PAGE                                          
SETUP TO PROCESS THE NEXT FOOTNOTE (415)                                  
ENDDO                                                                     
UPDATE THE ESCAPEMENT VALUES FOR THE                                      
PAGINATOR VIA PROGRAM SEGMENT UPDATE                                      
SET AN APPROPRIATE EXIT RETURN CODE                                       
RETURN                                                                    
BEGSEG (BLANK --LN)                                                       
DETERMINE HOW MANY BLANK LINES MUST BE                                    
INSERTED TO (387) PROVIDE FOOTNOTE SPACING                                
IF THE PREVIOUS FOOTNOTE DID NOT END WITH A                               
LINE (388) ENDING CONTROL THEN                                            
INSERT A REQUIRED CARRIER RETURN TO FORCE                                 
THE (389) POINT OF INSERTION FOR THE BLANK DELIMITER                      
LINES TO THE START OF A LINE                                              
ENDIF                                                                     
UNTIL ALL THE BLANK LINES ARE INSERTED INTO                               
THE LIMITED TSB BUFFER DO (391)                                           
INSERT A REQUIRED CARRIER RETURN PRIOR TO                                 
THE (390) POINT OF OPERATION                                              
ENDDO                                                                     
ENDSEG (BLANK --LN)                                                       
BEGSEG (COPY --FN)                                                        
IF PERFORMING LIMITED FOOTNOTE ALGORITHM                                  
RESOLUTION (392) THEN COPY THE FOOTNOTE TEXT INTO THE                     
FORMATTED FOOTNOTE LIMITED TSB (393)                                      
ELSE                                                                      
GO TO THE FOOTNOTE PAGE VIA THE INDEFINITE                                
LENGTH DOCUMENT TSB BY MOVING THE TEXT STORAGE                            
BUFFER POINT OF OPERATION TO THE DESIRED FOOTNOTE                         
PAGE (394) -ENDIF                                                         
INSERT THE FOOTNOTE NUMBER SEQUENCE PRIOR TO                              
THE (395) FOOTNOTE TEXT                                                   
SETUP A COUNTER THAT WILL KEEP TRACK OF THE                               
NUMBER (396) OF FOOTNOTE TEXT LINES FOR THE FOOTNOTE                      
REFERENCE CONTROL                                                         
UNTIL THE END OF THE FOOTNOTE TEXT IS FOUND                               
DO (399) ADJUST THE FOOTNOTE TEXT LINE BETWEEN THE                        
LEFT AND RIGHT MARGINS (397)                                              
INCREMENT THE COUNTER THAT IS KEEPING TRACK                               
OF THE (398) NUMBER OF FOOTNOTE TEXT LINES                                
ENDDO                                                                     
IF THERE ARE NO LINES IN THE FOOTNOTE TEXT                                
PAGE THEN (400) INSERT A REQUIRED CARRIER RETURN (401)                    
SET THE NUMBER OF LINES FOR THIS ENTRY TO 1 (402)                         
ENDIF                                                                     
SAVE THE NUMBER OF TEXT LINES CALCULATED IN                               
THE ENTRY&#39;S LINE COUNT FIELD (403)                                        
IF NOT PERFORMING LIMITED TSB MODE                                        
RESOLUTION THEN (404) IF THE FOOTNOTE TEXT PAGE&#39;S PAGE ENDING             
CONTROL IS NOT AT THE START OF A LINE THEN (405)                          
INSERT A REQUIRED CARRIER RETURN PRIOR TO                                 
THE PAGE END CONTROL (406)                                                
ENDIF                                                                     
MOVE THE POINT OF OPERATION TO THE START                                  
OF THE FOOTNOTE TEXT PAGE (407)                                           
DELETE THE FOOTNOTE NUMBER SEQUENCE. THE                                  
ROUTINE (408) EPAG WILL INSERT LATER                                      
STORE THE FORMATTED FOOTNOTE TEXT PAGE BACK                               
TO THE FOOTNOTE DISKETTE (409)                                            
ENDIF                                                                     
ENDSEG (COPY --FN)                                                        
BEGSEG (UPDATE)                                                           
DETERMINE THE MAXIMUM NUMBER OF FOOTNOTE                                  
TEXT LINES (417) THAT MAY BE INSERTED IN A PAGE                           
IF THE NUMBER OF AVAILABLE LINES TO INSERT                                
ITS (418) GREATER THAN THE MAXIMUM NUMBER OF                              
FOOTNOTE TEXT LINES THAT MAY BE INSERTED IN A PAGE                        
THEN (419) SET THE NUMBER OF AVAILABLE LINES TO INSERT                    
EQUAL TO THE MAXIMUM NUMBER OF FOOTNOTE TEXT LINES                        
THAT MAY BE INSERTED IN A PAGE                                            
ENDIF                                                                     
UPDATE THE NEW VALUE FOR NUMBER OF TEXT                                   
LINES TO (420) INSERT                                                     
UPDATE THE NEW VALUE FOR ESCAPEMENT DUE TO                                
TEXT (421) LINES THAT ARE TO BE INSERTED                                  
INSURE THAT THE CALCULATED ESCAPEMENT WILL                                
ALL FIT (422) IN THE CURRENT PAGE. ADJUST VALUE IF THE                    
ESCAPEMENT IS TOO MUCH                                                    
ENDSEG (UPDATE)                                                           
END (GETFN)                                                               
______________________________________                                    
 
    
     The purpose of the routine EPAG in Table 8 is to move FORMATTED footnote text to the end of the current page. The footnote text resides either in the formatted footnote TSB 140 (if the limited algorithm is used) or on pages in the footnote library (in a separate document or on page 9000 or above if in the same document). 
     Upon invocation, a page end decision has been made by the paginator and the TSB point of operation is at the start of a line. This line will be forced to the next page via the insertion of a page end control, but before the page end control is inserted, this routine must insert (prior to the TSB point of operation) the appropriate number of formatted footnote text lines along with all the necessary formatting controls. All the information required for these insertions is available in the footnote control block 108 and footnote reference buffer 110. 
     After determining how many lines it must insert, this routine inserts the necessary formatting controls to precede the footnote text, the separator line, and the formatting controls to following the footnote text. 
     After the formatting controls are inserted, this routine either fetches all of the formatted footnote text from the formatted footnote TSB 140 (if the limited algorithm was able to be used) or (if the indefinite length algorithm had to be used) then it fetches in the footnote text for the first footnote. The footnote&#39;s respective entry in the footnote reference buffer 110 contains the pointers to each footnote text page. Note that the footnote reference buffer 110 causes the system to have an &#34;internal resolution limit&#34; of about 20 footnotes per page if each footnote is stored in a separate document and up to 142 footnotes per page if each footnote is stored on page 9000 or above of the same document that contains the body text with the corresponding footnote references. 
     If necessary, lines that have been inserted in the previous page will be deleted after the entire footnote text is fetched. 
     If the entire footnote fits and more footnote text is pending, the insertion sequence will continue with the next footnote. 
     If the entire footnote won&#39;t fit, then the footnote text that won&#39;t fit will be deleted. These lines will appear on the next page. 
     After the insertion is complete, the necessary pointers in the footnote resolution control block 108 are updated. The footnote resolution buffer will also be updated to reflect the insertions. 
     Table 8 is also shown in flow chart form in FIG. 17. The numbers in parenthesis in Table 8 correspond to the reference numerals in FIG. 17. 
     
                       TABLE 8                                                     
______________________________________                                    
BEGIN                                                                     
MODIFY THE VERTICAL ESCAPEMENT DUE TO                                     
PENDING (425) FOOTNOTE TEXT LINES THAT ARE TO BE INSERTED                 
AT THE BOTTOM OF THIS CURRENT PAGE DUE TO ANY                             
&#34;WIDOW&#34; OR &#34;ORPHAN&#34; LINE DECISIONS MADE BY THE                            
PAGINATOR IF IT HAS BEEN DETERMINED THAT THERE ARE                        
FORMATTED (426) FOOTNOTE TEXT LINES TO INSERT AT THE BOTTOM               
OF THIS CURRENT PAGE THEN                                                 
SAVE THE CURRENT PAGE END LOCATION (427)                                  
INSERT PRIOR TO THE CURRENT POINT OF                                      
OPERATION THE (428) FOOTNOTE TEXT FORMATTING SEQUENCE THAT WILL           
ENCAPSULATE THE PENDING FOOTNOTE TEXT                                     
IF PERFORMING LIMITED MODE TSB ALGORITHM                                  
THEN (429) INSERT THE PENDING FOOTNOTE TEXT VIA                           
PROGRAM (430) SEGMENT LIMITED                                             
ELSE                                                                      
INSERT THE PENDING FOOTNOTE TEXT VIA                                      
PROGRAM (431) SEGMENT INDEF                                               
ENDIF                                                                     
RESTORE POINT OF OPERATION TO PAGE END                                    
LOCATION (457) -ENDIF                                                     
RETURN                                                                    
BEGSEG (LIMITED)                                                          
OBTAIN THE VERTICAL ESCAPEMENT OF THE                                     
FOOTNOTE TEXT LINES TO BE INSERTED                                        
IF THE INTERNAL RESOLUTION LIMIT HAS NOT                                  
BEEN (432) REACHED AND ALL OF THE PENDING FOOTNOTE                        
TEXT WILL FIT THEN                                                        
INSERT ALL OF THE PENDING FOOTNOTE                                        
TEXT (433) -ELSE                                                          
ADVANCE TO THE TOP OF THE LIMITED TSB                                     
BUFFER (434) MOVE THE POINT OF OPERATION TO THE END                       
OF THE LAST FOOTNOTE LINE THAT IS TO BE COPIED                            
INSERT INTO PAGE THE FOOTNOTE TEXT THAT                                   
IS BOUNDED (435) BY THE TOP OF LIMITED TSB BUFFER AND THE                 
POINT OF OPERATION                                                        
ENDIF                                                                     
UPDATE THE FOOTNOTE CONTROL BLOCK AND                                     
FOOTNOTE (436) REFERENCE BUFFER TO REFLECT THE NUMBER OF                  
FOOTNOTE TEXT LINES INSERTED                                              
ENDSEG (LIMITED)                                                          
BEGSEG                                                                    
OBTAIN THE VERTICAL ESCAPEMENT DUE TO                                     
FOOTNOTE TEXT LINES THAT ARE TO BE INSERTED                               
OBTAIN THE OFFSET TO THE FIRST FOOTNOTE                                   
ENTRY IN (437) THE FOOTNOTE RESOLUTION BUFFER                             
SETUP A COUNTER FOR THE NUMBER OF LINES                                   
INSERTED (433) UNTIL ALL THE FOOTNOTE TEXT LINES THAT                     
ARE TO APPEAR ON THIS PAGE ARE INSERTED DO (455)                          
IF THE FOOTNOTE REFERENCE WAS RESOLVED (439)                              
SUCCESSFULLY THEN                                                         
INSERT THE FOOTNOTE TEXT (440)                                            
ELSE                                                                      
INSERT INTO TEXT THE APPROPRIATE FOOTNOTE                                 
(441) RESOLUTION ERROR MESSAGE                                            
ENDIF                                                                     
ADD TO THE COUNTER KEEPING TRACK OF HOW                                   
MANY LINES (442) HAVE BEEN INSERTED THE NUMBER OF INSERTED                
LINES FOR THIS FOOTNOTE                                                   
SUBTRACT FROM THE COUNTER KEEPING TRACK                                   
OF HOW (443) MUCH ESCAPEMENT REMAINS TO BE INSERTED                       
BY THE INSERTED ESCAPEMENT                                                
IF THERE IS STILL MORE ROOM FOR FOOTNOTE                                  
TEXT THEN (444) DETERMINE THE NUMBER OF BLANK LINES TO                    
INSERT (445) FOR FOOTNOTE SPACING                                         
DETERMINE THE ESCAPEMENT DUE TO THESE                                     
BLANK (446) LINES                                                         
IF THERE IS ROOM FOR THESE BLANK LINES                                    
THEN (447) ADJUST THE INSERTION ESCAPEMENT COUNTER                        
(448) ACCORDINGLY                                                         
ADJUST THE INSERTION LINE COUNTER                                         
ACCORDINGLY (449) INSERT THE BLANK LINES INTO TEXT (451)                  
SETUP TO PROCESS THE NEXT FOOTNOTE (452)                                  
ELSE                                                                      
INDICATE THAT NO MORE FOOTNOTE TEXT CAN                                   
BE (450) INSERTED                                                         
ENDIF                                                                     
ENDIF                                                                     
ENDDO                                                                     
UPDATE THE FOOTNOTE CONTROL BLOCK AND                                     
FOOTNOTE (453) REFERENCE BUFFER TO REFLECT THE NUMBER OF                  
FOOTNOTE TEXT LINES INSERTED                                              
IF THERE WILL BE NO FOOTNOTE TEXT LINES                                   
FLOWING TO (454) THE NEXT PAGE AND SYSTEM IS PERFORMING                   
REGULAR RESOLUTION THEN                                                   
STOP USING THE INDEFINITE ALGORITHM SO                                    
THAT THE (456) LIMITED ALGORITHM WILL BE USED ON THE                      
NEXT PAGE -ENDIF                                                          
ENDSET (INDEF)                                                            
END (EPAG)                                                                
______________________________________                                    
 
    
     Table 9 is also shown in flow chart form in FIG. 18. The numbers in parenthesis in Table 9 correspond to the reference numerals in FIG. 18. 
     
                       TABLE 9                                                     
______________________________________                                    
BEGIN (EDOC)                                                              
IF FOOTNOTES ARE BEING PLACED AT THE END                                  
OF THE (460) DOCUMENT AND THE END OF THE DOCUMENT HAS BEEN                
REACHED AND NO FOOTNOTE TEXT HAS BEEN                                     
RESOLVED THEN OBTAIN POINTER TO THE FOOTNOTE REFERENCE                    
BUFFER (461) CONTAINING POINTERS TO EVERY FOOTNOTE                        
FOUND IN THE DOCUMENT                                                     
UNTIL THE LAST REFERENCE HAS BEEN                                         
RESOLVED DO (464) FETCH FOOTNOTE TEXT (462)                               
INSERT THE NUMBER OF BLANK LINES AS                                       
SPECIFIED BY (463) THE &#34;NUMBER OF BLANK LINES BETWEEN                     
FOOTNOTES&#34; PARAMETER                                                      
ENDDO                                                                     
ENDIF                                                                     
END TABLE 9 (EDOC)                                                        
______________________________________                                    
 
    
     In summary, a unique method of, and system for, managing numbering of footnote references and footnotes from input to output is provided in order to reduce planning and multiple drafts, increase throughput, and remove normal editing restrictions. With this invention, an operator can input a footnoted document during a single pass. During input of the document, body text is keyed up to a reference number point. During this body text keying, the text is displayed and editing is permitted. At the reference number point, a reference control is keyed and a display frame is presented for keying the footnote. Editing of the footnote is also permitted. Following input of the footnote, the operator returns to the body text display frame for continued keying, and the footnote is stored away in a footnote library. The system automatically assigns corresponding numbers to the reference point and the footnote. Should later editing require number changes, this will be automatically taken care of by the system. Following input keying of the body and footnote text, operator procedure calls for causing the system to assemble the body and footnote text. The assembly operation involves combined merge and pagination operations. Following assembly, the document can be display recalled on a page basis for review and editing. Thereafter, the document is ready to be printed. 
     While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made without departing from the spirit and scope of the invention.