Obtaining Information from an Application Program

An application program can access a catalog and retrieve information or perform other tasks. This can be done by using macros, or by using calls to system services or programs like access method services (IDCAMS).

The following is a list of macros or other callable services that can be used with catalogs, and a brief description of their use:

Table 1. Macros and System Services for Accessing Catalogs
Service	Description
CATALOG and CAMLST CAT	Macros used to catalog a non-catalog data set.
CATALOG and CAMLST RECAT	Macros used to recatalog a non-catalog data set.
CATALOG and CAMLST UNCAT	Macros used to uncatalog a non-catalog data set, if it is not managed by the Storage Management Subsystem.
CATALOG SEARCH INTERFACE	Provides an alternative to LISTCAT that allows customizing of the output. You can display as little or as much information as you want. Also includes some information that LISTCAT does not provide. Three Assembler H sample programs and one REXX program are provided as part of CSI. See Catalog Search Interface User's Guide. For more information, see HLASM Programmer's Guide
IGWASMS	A DFSMS attribute call service used to identify the SMS classes for a data set, and determine whether the data set is a PDSE. For more information, see z/OS DFSMSdfp Advanced Services.
IKJEHCIR	A TSO programming service that can be used to retrieve a list of data sets with a matching high-level qualifier, and their associated data set types. It can also be used to identify the volume serial numbers and device types associated with a name, and find the next level qualifiers for a name. For more information, see z/OS TSO/E Programming Services.
LOCATE and CAMLST NAME	Macros used to retrieve information about a data set. For more information, see z/OS DFSMSdfp Advanced Services.
SHOWCAT	A macro used to retrieve information about a catalog data set or generation data group. For more information, see z/OS DFSMS Macro Instructions for Data Sets.