Q

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Q.931: An ITU recommendation that defines the network layer protocol for integrated services digital network (ISDN). This layer carries the ISDN messages that control the establishment and clearing of calls.
Q.932: The CCITT Recommendation that defines the generic procedures applicable for the control of supplementary services at the user-network interface. These procedures expand on the basic call-control functions defined in Q.931.
QCMD: The IBM-supplied control language processor that interprets and processes CL commands for the system.
QGPL: See general purpose library.
QHST: A message destination that is an alternative to the job log.
QLLC: See qualified logical link control.
QoS: See quality of service.
QOS: See quality of service.
QoS policy: A set of actions that a network takes to configure and signal for a particular quality of service (QoS) service to be provided to a particular traffic classification.
Qshell Interpreter: A standard command interface that is used to run standard commands, such as UNIX-like commands and Java™ commands, and then view the output.
QSRV: The IBM-supplied user profile for a service representative.
QSYS: (1) The library shipped with the system that contains objects, such as authorization lists and device descriptions created by a user, and the system commands and other system objects required to run the system. The system identifier is QSYS.; (2) The IBM-supplied user profile that owns most IBM-supplied objects.
qualified data-name: In COBOL, an identifier that is composed of a data-name followed by one or more sets of either of the connectives OF or IN followed by a data-name qualifier.
qualified job name: A job name and its associated user name and a system-assigned job number. See also job name.
qualified logical link control (QLLC): An X.25 protocol that allows the transfer of data link control information between two adjoining SNA nodes that are connected through an X.25 packet-switching data network. The QLLC provides the qualifier Q bit in X.25 data packets to identify packets that carry logical link protocol information. See also enhanced logical link control, physical services header.
qualified name: The name of the library containing the object and the name of the object.
qualifier: In data processing, all names in a qualified name other than the name to the far right, which is called the simple name.
quality of service (QoS QOS): (1) Any operation that allows traffic priorities to be designated. Through QoS, different traffic throughout a network can be classified and administered.; (2) In OSI, a value that specifies certain performance characteristics of a service, session, or link. In OSI Communications Subsystem, quality of service is provided at the network layer.
quantified predicate: A predicate that compares a value with a set of values.
query: (1) A request for information from the database based on specific conditions. For example, a request for a list of all customers in a customer table whose balance is greater than $1000.; (2) The DB2® UDB for iSeries™ query management object that is used to define queries against relational data.
query command: The name of an action, and any associated parameters, that can be performed by DB2 UDB for iSeries query management. The query commands include ERASE, EXIT, EXPORT, GET, IMPORT, PRINT, RUN, SAVE, SET, and START.
query command procedure: In DB2 UDB for iSeries query management, a type of query procedure that contains a subset of the query commands allowed in a query procedure. The query command procedure can be used for initializing global variables.
query definition: In Query for iSeries, information about a query that is stored in the system. The system-recognized identifier for the object type is *QRYDFN.
Query for iSeries: The IBM® licensed program used to select, format, and analyze information from data files to produce reports and other files.
query instance: In DB2 UDB for iSeries query management, a collection of system resources and a set of query commands within an application program.
query management: A function of DB2 UDB for iSeries that provides query and report writing by using Structured Query Language (SQL).
query management object: In query management, a collective term to describe any of the query management objects: query, form, or procedure.
Query Manager: See DB2 Query Manager.
query mode: In query management, the processing mode associated with a query instance.
queue: A list of messages, jobs, files, or requests waiting to be read, processed, printed, or distributed in a predetermined order.
queued call: A telephone call that has been placed on hold and is waiting in the queue of telephone calls to be serviced by a system resource (such as an ACD group).
queue depth: In SNADS, the number of distribution items on the distribution queue waiting to be sent.
queue manager: (1) A system program that provides queuing services to applications. It provides an application programming interface so that programs can access messages on the queues that the queue manager owns.; (2) An object that defines the attributes of a particular queue manager.
quick query: A query that is run using only a file name and possibly some record selection specifications; an undefined query.
QuickStep pad: A window containing a variable number of buttons that can be clicked on with a mouse. Each button can be assigned a macroinstruction that issues a predefined sequence of keystrokes or commands.
quiesce: To become inactive.
quiescing: In WebSphere® MQ, the state of a queue manager before it stops. In this state, programs are allowed to finish processing, but no new programs are allowed to start.
quorum resource: A designated single drive in a cluster that contains the configuration data used by the cluster to recover the cluster database. The quorum resource is created as a network server storage space with the cluster name specified on the Cluster name and uses the Cluster configuration information.