Use the catalog information routine to retrieve information from the system catalog. This information can include data set name, index name, control volume address, or volume serial number. The information can be requested from a specific user catalog, or, if no catalog is specified, the system default catalog search is used. The following kinds of information can be requested:

• The next-level qualifiers for a name
• All names having the same name as the high-level qualifier and the data set type associated with each name
• The volume serial numbers and device types associated with a name.