Describing a FOCUS Data Source

Topics:

The following covers data description topics unique to FOCUS data sources:

  • Design tips. Provides suggestions for designing a new FOCUS data source or changing the design of an existing data source.
  • Describing segments. Contains information about Master File segment declarations for FOCUS data sources, including defining segment relationships, keys, and sort order using the SEGTYPE attribute, and storing segments in different locations using the LOCATION attribute.
  • Describing fields. Contains information about Master File field declarations for FOCUS data sources, including the FIND option of the ACCEPT attribute, indexing fields using the INDEX attribute, redefining sequences of fields using the GROUP attribute, and the internal storage requirements of each data type defined by the FORMAT attribute, and of null values described by the MISSING attribute.
  • Describing partitioned data sources. Contains information about Master File and Access File declarations for intelligently partitioned FOCUS data sources.

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