Method for display panel processing
TECHNICAL FIELD 
     The present invention relates to a method for display panel processing and more particularly to panel processing in an interactive terminal-host data processing system. 
     BACKGROUND OF THE INVENTION 
     A number of display processor systems are known in the art as set forth below. 
     An interactive terminal-host data processing system is described in a paper by M. Maurer entitled &#34;Full screen testing of interactive applications&#34;, IBM Systems Journal, Vol. 22, No. 3, 1983, PP246-261. 
     An interactive data processing system is also described in the IBM Manual &#34;Interactive System Productivity Facility&#34;, Publication No. GC34-2181-0, Oct. 1984. 
     The interactive system productivity facility/program development facility (ISPF/PDF) described in the cited two publications provides dialog management services in host computer environments to users of display terminals. Dialog management services may be used by an application developer to produce interactive applications in the form of menu-driven dialogs and dialog functions to make the application easy to use by a non-experienced user. 
     ISPF/PDF is a dialog application that provides application development services to both experienced and non-experienced professional people. It is used to create and maintain both source programs and text data. ISPF/PDF provides interfaces to many system facilities via easy to use menus, relieving the users of the need to know the specific command syntax of the interactive system they are using. 
     The ISPF/PDF facility provides an interface between a user terminal and a host data base including a display panel library and a data table library. The ISPF/PDF facility makes the panel and data libraries transparent to the end-user at the terminal. Some of the panels in the panel library, selection panels, are available for the terminal operator as selection menus, whereas other panels are functioning as data entry panels, for data access between the terminal and the data tables in the data base. 
     Whereas ISPF/PDF facility extensively improves the interactive data flow between the operator at the terminal and his data base in the host system, there is still a need for improvements providing a still better service for the terminal operator. Some times, for instance; the operator has to handle a large amount of display panel lay-outs which frequently must be changed and such a housekeeping work might be for certain applications cumbersome and time-consuming. 
     DISCLOSURE OF THE INVENTION 
     An interactive terminal-host data processing system is disclosed in which display panel processing is performed in a number of steps. A host data base stores a display panel library and data. The terminal displays a list of panel layouts for panels stored in the library. One layout is selected from the list and the selected panel layout is displayed. The selected panel layout is modified at the terminal when the panel is displayed. The modified panel layout is stored in the panel library. The stored panels, including the modified panel, are utilized in the interactive data communication between the terminal and the host data base. 
    
    
     BRIEF DESCRIPTION OF THE DRAWINGS 
     FIG. 1 discloses a block diagram of a terminal host interactive system to be used according to the present invention. 
     FIG. 2 discloses a block diagram of an operation planning and control (OPC) system including the present invention. 
     FIG. 3 discloses a work station communication dialog panel flow according to the present invention. 
     FIGS. 4-10 discloses display panels according to the present invention. 
    
    
     BEST MODE OF CARRYING OUT THE INVENTION 
     FIG. 1 discloses an interactive terminal-computer system including a host computer 1, an operator terminal 2 and a peripheral storage unit 5 such as a direct access disk storage. The storage 5 comprises a data base 8 including a panel library 6 and a table library 7. The panel library 6 comprises a plurality of display panels to be selectively accessed by the operator at terminal 2 and displayed at the terminal display unit. Some of the panels in the panel library 6 are selection panels to be used when accessed as menus for further selection of store information. Other panels are data entry panels to be used by the terminal operator for table access and for updating data in the tables of the table library 7. 
     The dialog between the terminal 2 and the host 1 for information access to the data base 8 is managed by the interactive system productivity facility (ISPF)/3 in the host. This ISPF/3 operates as a dialog manager freeing the terminal operator from a complex and detailed program handling operation. The data access between the host 1 and the disk storage 5 is controlled by a well-known VSE-Virtual Storage Access Method block 4 as described in the IBM Publication VSE-Virtual Storage Access Method General Information, GC24-5143. 
     According to the present invention the terminal-host dialog will not only enable panel access and update operations at the terminal 2 but will also enable favorable able methods for dynamically creating, selecting and modifying panels in the panel library 6. 
     The present invention will now be described more in detail as an implementation in an Operations Planning and Control system, more particularly described in the IBM Publication Operations Planning and Control, GH 19-6120-2. However, it should be understood that such an implementation is only taken as an example. The invention is useful in many other interactive terminal-host applications. 
     Operations Planning and Control (OPC) is a system designed to enable planning and monitoring of the operations in a Data Processing (DP) operations department from the receipt of input data to the delivery of final results and reports to the user. 
     The basis of the OPC system is data sets which define the installation and the work processed. In these data sets, it is defined when the installation is operational, how much capacity is available for each type of work activity, how often applications run, and what resources each application requires. Once these data sets have been built up, they provide valuable documentation about the entire operation. They also provide the basis for the OPC plans by showing when and how work is to be processed by the DP operations department. 
     OPC is an on-line monitoring system designed to be used by the operators as they are performing their jobs. As work flows through their work stations, they report to OPC on the status of each individual application. OPC in return informs them about work being processed at other work stations so they may prepare in advance. When jobs arrive, OPC suggests the order in which work should be processed, and shows information such as deadlines, how long jobs will take to be processed, and what processing is required. 
     OPC facilitates job control (JCL) preparation by providing a menu-driven dialog, by which job setup clerks can prepare JCL in advance via a display terminal. They can also modify a JCL already prepared. 
     OPC automates complex and/or repetitive operator tasks, by automatically controlling when a job is ready to be executed, dependent on time-of-day or dependent on other preparations or jobs having to be completed. When a job is ready to run, OPC will automatically pick out the correct version of the JCL, submit the job (if not done beforehand), and release it. 
     OPC is not just a monitoring system. It is also a resource planning system, because OPC produces planning information well in advance of when applications are due to be processed. Prior to starting up the day&#39;s operations, OPC planning functions analyze the whole network of interdependent operations for that session. It breaks processing down into fine detail, examining each operation of an application at each individual work station. It organizes the workflow to minimize missed deadlines, and gives the fastest throughput to the highest priority jobs. 
     Some days or weeks before a session, Operations Management can review these plans and prepare the operations organization. One can identify peak and slack periods and determine what capacity is needed. By simulating what is likely to happen using different configurations with different workflows, the open hours and manpower requirements at work stations can be predetermined to provide an acceptable service level to application owners and an acceptable work load for the personnel. 
     OPC constructs long-term and daily plans based on user-supplied descriptions of the DP operations department and its work: these plans help DP operations do its job effectively. 
     DP operations is usually organized into small groups which specialize in some particular step in the production process. These groups are called &#34;work stations&#34; by OPC. 
     There are three different types of work stations: 
     Computer work stations. A computer work station contains one processor, or a group of processors serving a single job queue. 
     Print work stations. 
     General work stations. General work stations describe all work stations except computer work stations and print work stations. 
     When describing work stations to OPC, it should be done in terms of one of these three types. The description should also specify the hours when a work station is open, the resources available at the work station, and certain other characteristics. 
     The overall OPC functions will now be described with reference to FIG. 2. 
     The work to be performed in the DP installation must be described and stored in OPC application description data sets 22. Similarly the work station descriptions are stored in data sets 21. A calendar, specifying working days and holidays etc. is stored in a calendar storage 23. All these basic information can be updated and controlled by an operator at a terminal 26. 
     The calendar information and application description information can be combined in OPC long-term planning block 29 and stored in long-term planning storage 24. This long-term planning storage 24 can produce long-term planning records 32. 
     The work station information, the calendar information and long-term planning information can be combined in an OPC daily planning function 36 to be stored in a current plan storage 25. The OPC daily planning information 36 can produce a daily plan 33 and a management report 34. The current plan 25 can be updated and controlled by an operator at a terminal 27. The updated current plan can also be used to update the OPC daily planning function 36, as indicated by the arrow 38. 
     An OPC job tracking function 31 is tracking work station events 35 and is interactively controlled by an operator event terminal 28. The OPC job tracking function 31 produces a tracklog 37. The job tracking function 31 is also fed back to the application description storage 22 as indicated by the arrow 39. 
     The work station communication dialog panel flow will now be described with reference to FIG. 3. 
     The purpose of the work station communication is to communicate statuses of events between OPC and the work station operator. As part of this process some special functions are also presented to the work station operator. These are: 
     list of jobs that have been submitted but are not yet ready to be run, so called waiting list. 
     list of jobs defined to current plan for preparation. 
     list of work stations for status information. 
     a function to redefine ready list layouts. 
     The main function of the work station communication is however the handling of ready lists. In this function a list of operations that are ready to be reported on is presented to the operator. The operator then reports the status changes he is doing to the operations. Each time the list is displayed it is updated so that it always shows the current status. 
     Before the list is displayed the operator may limit the contents of the list by specifying selection criteria. The layout and sort order of the list can also be dynamically changed all the time. Besides reporting status changes the operator can get full information of any operation in the list, also looking at operator instructions if any exist. If the work station is defined as a job setup work station, selecting an operation to be started gives access to the editor for editing the JCL for the selected job. At completion of the editing the operation will automatically be set to completed. 
     The communication dialog is started by the operator at the terminal 2 in FIG. 1 accessing a main menu panel. More specifically such main menu might be the OPC main menu accessed by the operator at the terminal 28 according to FIG. 2. From this main menu, not shown, the operator might select a work station communication RTOPP panel 40 in FIG. 3. This RTOPP panel is shown in more detail in FIG. 4. 
     The function of RTOPP is to let the user browse and report status of operations in the current plan and prepare JCL for jobs in the plan. The operator may select one of the operations by inserting 1-9 into the option line. 
     The operations selected are as follows: 
     1. SELECT READY LIST--Displays a panel where the user specifies select criteria for the ready list, and then displays the list. In the list the user can report status of operations, browse operation information or operator instructions. 
     2. SELECT WAITING LIST--Displays a panel where the user specifies select criteria for the waiting list, and then displays the list. In the list the user can browse operation information or operator instructions. 
     3. SELECT JOB FOR SETUP--Displays a panel where the user specifies select criteria for the jobs to be prepared and then displays the list. In the list the user can edit JCL for a job, browse operation information or operator instructions. 
     4. DISPLAY WS STATUS--Displays a list with all work stations in current plan. 
     Please note that operations 5-8 are not utilized, and accordingly are omitted. 
     9. DEFINE RL LAYOUT--Gives the user an opportunity to define or redefine the layout of ready lists. The user may override the installation defined layouts or add, change and delete his own layouts. The user defined layouts are kept for this user. 
     In case the operator selects the number 2, waiting list, he will get the panel 42 RSVLP according to FIG. 3. If he selects the number 3, job setup, he will get the RSJBP panel 43 according to FIG. 3. 
     In case the operator selects number 1, ready list, he will get the panel RSRLP 41 in FIG. 3. RSRLP, specify ready list panel is shown in more detail in FIG. 5. The function of the panel is as follows: 
     The user can specify work station and ready list layout for the ready list to be displayed. The user may also limit the contents of the ready list by entering values for the optional selection criteria. If any selection criteria is entered only the operations that match that criteria will be part of the ready list. If work station name is not given the user will be presented a list of the work stations in the current plan. The user then selects the wanted work station from that list. If the given ready list layout does not exist or if a ready list layout is not given a list of existing layouts will be presented to the user. The user may then select a layout from the list or choose to create a new layout which will then be used. ENTER executes the selected option or issues an error message and END, CANCEL returns to previous panel, while RETURN returns to previous main menu (OPC main menu). 
     
         ______________________________________                                    
Field          Reply - Action                                             
______________________________________                                    
WORK STATION   Name of the work station to be                             
NAME           used. If the name is blank or                              
               invalid a list of existing work                            
               stations will be presented an the                          
               operator can choose one from the                           
               list. The field is initialized                             
               with the work station name last                            
               used by the user.                                          
READY LIST TYPE                                                           
               Name of the ready list layout to                           
               be used. If the name is blank or                           
               invalid a list of existing layouts                         
               will be presented and the operator                         
               can choose one from the list. The                          
               field is initialized with the                              
               layout name last used by the user.                         
APPLICATION ID A generic name that limits the                             
               contents of the list to operations                         
               that have an application id that                           
               matches the given one. The field is                        
               initialized with the value last                            
               used by the user.                                          
JOB NAME       A generic name that limits the                             
               contents of the list to operations                         
               that have a job name that matches                          
               the given one. The field is ini-                           
               tialized with the value last used                          
               by the user.                                               
LOWEST PRIORITY                                                           
               A value 1 to 9 representing the                            
               lowest priority an operation can                           
               have in order to be selected. The                          
               field is initialized with the value                        
               last used by the user.                                     
OPERATION      A combination of the statuses:                             
STATUS         . A - arrival                                              
               . B - ready                                                
               . S - started                                              
               . I - interrupted                                          
               . * - waiting for a special                                
               resource                                                   
               the status codes can be given in                           
               any order. Use of the field limits                         
               the contents of the list to opera-                         
               tions that have any of the listed                          
               statuses. The field is initialized                         
               with the value last used by the                            
               user.                                                      
DATE           A date in user date format that                            
               limits the contents of the list to                         
               operations that have any of the                            
               following dates lower than the                             
               given one:                                                 
               . Operation Input Arrival                                  
               . Planned Start                                            
               . Latest Start                                             
               The field is initialized with the                          
               value last used by the user.                               
TIME           A time in user time format that                            
               limits the contents of the list to                         
               operations that have any of the                            
               following times lower than the                             
               given one:                                                 
               . Operation Input Arrival                                  
               . Planned Start                                            
               . Latest start                                             
               The field is initialized with the                          
               value last used by the user.                               
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     In case the work station name in the panel RSRLP in FIG. 5 is blank, a panel RVSLL 51 in FIG. 3 will be selected. This panel will present a list of work stations in the current plan and from this list a specific work station can be selected. 
     According to this selection made in the panels 41 and 51 in FIG. 3 or only in the panel 41 a ready list panel RSRLM 52 will be accessed. RSRLM 52 is shown in more detail in FIG. 6. The function of the ready list panel is as follows: 
     Displays a list of operations that are ready on the work station. &#34;Ready&#34; means that the status of the operation can be changed, i.e. that it does not depend on any other operations or has not yet completed or ended in error. The user can change status of an operation in the list by reporting the status back to OPC. The list is sorted in user defined order, and every time an operation has been selected or just ENTER key has been pressed the list will be refreshed and resorted before being redisplayed. The layouts of the list are defined by the installation and/or user defined ready list layout. Work station and ready list layout can be dynamically changed directly in the ready list. The sort order can also be dynamically redefined any time. The list can be scrolled via a scroll command. 
     
         ______________________________________                                    
Field        Reply     Action                                             
______________________________________                                    
Command      Enter     The ready list will be                             
                       refreshed.                                         
             END       Normal return to ready list                        
                       selection.                                         
             RETURN    Normal return to OPC main                          
                       menu.                                              
             CANCEL    Return to ready list                               
                       selection, without execu-                          
                       tion of pending row                                
                       commands.                                          
             ISPF      Normal ISPF commands.                              
Scroll       ISPF      Normal ISPF scrolling                              
                       values                                             
WORK STATION Change value if the ready list is                            
             to be displayed for a new work                               
             station. If the field is blank a                             
             list of existing workstations is                             
             displayed.                                                   
READY LIST TYPE                                                           
             Change value if another list                                 
             layout is to be used. If the field                           
             is blank or a nonexistent layout is                          
             given a list of existing layouts is                          
             displayed.                                                   
Row cmd      Row command in list, following                               
             commands are valid.                                          
           S       Set next logical operation                             
                   status.                                                
           S-x     Set specific status; Where x                           
                   can be any of:                                         
                   S Set operation status to                              
                   started                                                
                   I Set operation status to                              
                   interrupted                                            
                   R Set operation status to                              
                   ready                                                  
                   C Set operation status to                              
                   completed                                              
                   E Set operation status to                              
                   ended in error                                         
           R       Reset operation status to                              
                   previous state                                         
           O       Display operator instruction                           
                   for operation                                          
           I       Inquire information of                                 
                   application                                            
Other column Defined in the ready list layout.                            
headers                                                                   
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     As mentioned above, a list of existing layouts will be displayed when the line &#34;ready list type&#34; in FIG. 6 is left blank. The panel RLCLL 53 in FIG. 3 presents such a list of ready list layouts. FIG. 7 discloses a detailed picture of the panel RLCLL/list of ready list layouts. The function of this panel is as follows: 
     Displays a list of the existing ready list layouts for the user to select one from. The user can select a layout or create a new list layout. The list can be scrolled via the scroll command. 
     
         ______________________________________                                    
Terminates with END, RETURN or CANCEL                                     
Field      Reply - Action                                                 
______________________________________                                    
Command    XTBLX Normal commands handled by OPC.                          
           where END/RETURN accepts changes                               
           and CANCEL rejects them.                                       
           ISPF Normal ISPF commands.                                     
           Create Creates a new layout from                               
           scratch.                                                       
Scroll     ISPF Normal ISPF scrolling values.                             
Row cmd    Row command in list, following commands                        
           are valid.                                                     
           S Selects a layout to be used in                               
           ready list.                                                    
           C Copies the selected layout to a                              
           new. The new layout will be used                               
           in ready list.                                                 
Layout header                                                             
           Name of the ready list layout.                                 
           This is the name that is                                       
           referred to in the display and                                 
           selection of ready lists.                                      
Description                                                               
           A verbal description of the                                    
           ready list type.                                               
Owner      TSO is of the owner of the                                     
           layout. The owner can either                                   
           be the id of the installation                                  
           defined layouts, or the id of                                  
           the current user.                                              
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     In case option No. 9, define alternative ready list layouts, in RTOPP Panel 40 is selected, a panel RRLLL 49, a list of ready list layouts, will be displayed as shown in FIG. 8. The function of the RRLLL panel is as follows: 
     Displays a list of the existing ready list layouts for the user to handle. The user can select to display, delete, change, copy or create a list layout. The layouts displayed are both the user&#39;s own definitions and the installation provided layouts, unless they are overridden by a user definition. The list can be scrolled via the scroll command. 
     
         ______________________________________                                    
Terminates with END, RETURN or CANCEL                                     
Field       Reply - Action                                                
______________________________________                                    
Command     XTBLX Normal commands handled by                              
            OPC. where END/RETURN accepts                                 
            changes and CANCEL rejects them.                              
            ISPF Normal ISPF commands.                                    
            CREATE Creates a new layout from                              
            scratch.                                                      
Scroll      ISPF Normal ISPF scrolling                                    
            values.                                                       
Row cmd     Row command in list, the following                            
            commands are valid:                                           
            B Browses an existing ready list                              
            layout.                                                       
            C Copies the selected layout to                               
            a new.                                                        
            M Modifies an existing layout.                                
            D Deletes an existing user                                    
            definition of a layout.                                       
            All modified and created layouts                              
            are kept as user definitions of the                           
            layouts and override the installa-                            
            tion definitions if necessary.                                
Layout id   Name of the ready list layout.                                
            This is the name that is referred                             
            to in the display and selection of                            
            ready lists.                                                  
Description A verbal description of the ready                             
            list type.                                                    
Owner       TSO id of the owner of the layout.                            
            The owner can either be the id of                             
            the installation defined layouts,                             
            or the id of the current user.                                
Last update Date and time in user format when                             
            the layout has last been modified.                            
            The last modifier is always the                               
            owner.                                                        
______________________________________                                    
 
    
     According to FIGS. 7 and 8 a new list layout can be created from scratch by entering the command CREATE into the panel RLCLL 53 and panel RRLLL 49 respectively. This can also be seen from FIG. 3 where a panel RLLCL 54 for creating a new layout is invoked either from the panel 53 or the panel 49. 
     The panel 54 for creating a ready list layout is disclosed in more detail in FIG. 9 and the function of this panel is as follows: 
     Lets the user create a new ready list layout. The user can give a name and descriptive text for the layout and creates the layout by selecting the fields to be displayed from a list of the fields that exists for the ready list. The user can define which order the fields are to be displayed and if a field is to be highlighted or not. If the number of selected fields exceeds the available size on the screen only the fields that can be displayed fully will be displayed in the layout. The current layout header will be displayed on the screen every time the user presses ENTER. The list of fields can be scrolled via the Scroll command. 
     
         ______________________________________                                    
Terminates with END, RETURN or CANCEL                                     
Field        Reply - Action                                               
______________________________________                                    
Command      XTBLX Normal commands handled by                             
             OPC.                                                         
             CANCEL rejects creation of the                               
             layout.                                                      
             ISPF Normal ISPF commands.                                   
Scroll       ISPF Normal ISPF scrolling                                   
             values.                                                      
READY LIST TYPE                                                           
             The name of the new layout, must                             
             be given and may not be an existing                          
             one.                                                         
LAYOUT       An optional descriptive text for                             
DESCRIPTION  the layout.                                                  
Layout Header                                                             
             The current header as it is com-                             
             posed of the currently selected                              
             fields. Not modifiable.                                      
S            Selects a field to be displayed.                             
             blank Removes a field from the                               
             layout.                                                      
             S Selects a field to be a                                    
             part of the layout. The                                      
             field will be placed at                                      
             the end of the selected                                      
             fields.                                                      
             1-99 Selects and orders a field                              
             in the layout. The fields                                    
             are ordered in the layout                                    
             according to the given                                       
             number. If several fields                                    
             have been assigned the                                       
             same ordering number their                                   
             order is unpredictable.                                      
H            Specifies if a field is to be                                
             highlighted.                                                 
             A selected field will be                                     
             displayed as a normal status                                 
             field.                                                       
             Y The field will be displayed as                             
             an emphasized status field.                                  
Column title The title of the field as it will                            
             appear in the header.                                        
Length       The length of the field. The                                 
             space reserved for the field in the                          
             layout is the maximum of this value                          
             and the length of the title.                                 
Description  A descriptive text of the field.                             
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     A panel RLLML 55 for modifying a ready list layout will be invoked from the panel RRLLL 49. This panel RLLML for modifying ready list layout is disclosed in more detail in FIG. 10 and the function of this panel is as follows: 
     Lets the user modify an existing list layout. 
     The user can change the descriptive text for the layout and change the layout by selecting the fields to be displayed from a list of the fields that exists for the ready list. The user can define which order the fields are to be displayed and if a field is to be highlighted or not. If the number of selected fields exceeds the available size on the screen only the fields that can be displayed fully will be displayed in the layout. The current layout header will be displayed on the screen every time the user presses ENTER. If the user saves the layout it will be kept as a user definition. If an installation definition with the same name exists the user definition will override the installation one until the user definition is deleted. The list of fields can be scrolled via the Scroll command. 
     
         ______________________________________                                    
Terminates with END, RETURN or CANCEL                                     
Field       Reply - Action                                                
______________________________________                                    
Command     XTBLX Normal commands handled by                              
            OPC.                                                          
            CANCEL rejects modification of the                            
            layout.                                                       
            ISPF Normal ISPF commands.                                    
Scroll      ISPF Normal ISPF scrolling                                    
            values.                                                       
Ready list type                                                           
            The name of the new layout.                                   
LAYOUT      An optional descriptive text for                              
DESCRIPTION the layout.                                                   
Layout Header                                                             
            The current header as it is com-                              
            posed of the currently selected                               
            fields.                                                       
S           Selects a field to be displayed.                              
            blank Removes a field from the                                
            layout.                                                       
S           Selects a field to be a part                                  
            of the layout. The field will                                 
            be placed at the end of the                                   
            selected fields.                                              
            1-99 Selects and orders a field in                            
            the layout. The fields are                                    
            ordered in the layout accord-                                 
            ing to the given number. If                                   
            several fields have been                                      
            assigned the same ordering                                    
            number their order is unpre-                                  
            dictable.                                                     
H           Specifies if a field is to be                                 
            highlighted.                                                  
            A selected field will be                                      
            displayed as a normal status                                  
            field.                                                        
            Y The field will be displayed as                              
            an important status field.                                    
Column title                                                              
            The title of the field as it will                             
            appear in the layout header.                                  
Length      The length of the field. The space                            
            reserved for the field in the                                 
            layout is the maximum of this value                           
            and the length of the title.                                  
Description A descriptive text of the field.                              
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     In case B (Browse) is selected for the command column for row in the panel RRLLL 49 in FIG. 8, a panel RLLBP 56 for browsing a ready list layout is displayed. According to FIG. 3 the panel 56 will be invoked from the panel 49. 
     Similarly a panel RSJBL 61 for list of jobs can be selected from the panel RSJBP 43. 
     Referring further to FIG. 3 a panel ROPIB 65 for browsing operator instructions can be selected from either the panel 52 or the panel 61. Finally the panel RJCLE 63 for setting up work station and job control and a panel RSOSP 64 for setting operator status can be selected from the panel RSRLM 52. 
     A waiting list panel RSWLL 62 can be selected from the panel 42.