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.