|
These topics tell how to describe VSAM data sources and how they relate to FOCUS data sources. To access a VSAM data source, you must first describe it using FOCUS terminology. VSAM data source descriptions are stored as FOCUS Master Files (MASTERs). The FOCUS programs used to read or update them are called FOCEXECs. |
Topics: Simple ISAM and Key-Sequenced VSAM Data Sources |
Generally, standard FOCUS attributes apply for describing VSAM data sources as well (see your FOCUS documentation); exceptions are noted in these topics. Additional concepts in processing VSAM data sources require special FOCUS terminology at both the field and segment levels. These topics discuss specific aspects of creating FOCUS Master Files unique to VSAM sources. ESDS files are described in the same manner as KSDS files, but lack group keys.
Sites that wish to convert existing COBOL VSAM file descriptions directly into FOCUS Master Files can do so with the COBOL FD Translator, an optional FOCUS product that is sold and installed separately.
| Information Builders |