hecking during data transfer that involves checking parity on a row of binary digits that are members of a set that form a matrix.
long table space
See large table space.
long-term evolution (LTE)
An upgrade to both EDGE and HSPA networks (and considered a candidate for the 4G standard). LTE networks are not compatible with 2G or 3G networks. See also 4G.
long-term plan (LTP)
A high-level plan of system activity that covers a period of at least 1 day and not more than 4 years. It serves as the basis for a service level agreement with your users and as input to daily planning.
long wavelength (LWL, LX)
A type of fiber-optic cabling that is based on 1300-mm lasers and supports link speeds of 1.0625 Gbps. LWL also refers to the type of gigabit interface converter (GBIC) or small form-factor pluggable (SFP). See also short wavelength.
A blueprint for how questionnaire items are to appear in a printed questionnaire. A Look controls which information held in the questionnaire definition for the questionnaire item is displayed and controls how that information is positioned and formatted.
A simple, single-level reference structure in an extract, transform, and load (ETL) catalogue. Look-ups track the relationships between fact data and the operational data store that contributes to the fact.
- Tables that map data in item or category attribute instances to other values. For example, lookup tables can be used to map color codes to color values, so that only color codes are stored in item or category attribute instances, but when required, the corresponding color values can be retrieved. Lookup tables are used to create and maintain item and category information, to perform search and replace functions within an item or category, and to validate data contained in specific item or category fields.
- A data source that has a key value that jobs use to retrieve reference information.
- A logical list of colors or intensities. The list has a name and can be referenced to select a color or intensity. See also color table.
- A table used to convert information from a file in an external system to correspond with the local system.
- A data source that is used by a lookup policy to mask data in another data source.
- A database table used to map one or more input values to one or more output values.
A user who is authenticated in the Enterprise Directory and searches for other users. IBM Security Access Manager for Enterprise Single Sign-On uses the lookup user to retrieve user attributes from the Active Directory or LDAP enterprise repository.
- A connectivity topology that connects a series of systems or expansion units together. Signals can travel in either direction for optimized performance. Redundancy is provided to each unit by treating the connection as a string when a failure occurs somewhere in the loop.
- A set of questions that are to be asked more than once. In a categorical loop, the number of times that the loop is to be iterated is controlled by the categories in a category list. For example, a set of questions can be asked for each product in a product list. In a numeric loop, the number of times that the loop is to be iterated is controlled by a numeric expression. See also slice.
- A sequence of instructions performed repeatedly.
- A closed unidirectional signal path connecting input and output devices to a system.
- A configuration of devices connected to the fabric by way of a fabric loop port (FL_port) interface card.
- The physical connection between a pair of device adapters in the ESS. See also device adapter.
A feature of the IBM 4300 Processor family that allows the attachment of a variety of SNA and non-SNA devices. To VTAM, these devices appear as channel-attached type 2 physical units (PUs).
An interface that bypasses unnecessary communications functions when the information is addressed to an entity within the same system. See also loopback test.
A test in which signals from a tester are looped at a modem or other network element back to the tester for measurements that determine or verify the quality of th