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# The BASIS Data Dictionary

The BASIS Data Dictionary is a set of data files that describe the contents of the data files used in OSAS for use with the ODBC driver that is included in the OSAS ODBC Kit. The dictionaries are also used by the Software Development Utilities to print file layouts, created string templates, and so on.

The files carry the file extension .1, and the ODBC driver uses the files named that way. Here is a list of the files that make up the BASIS Data Dictionary:

File Name | Contents
FILE.1 | File information
FILMSC.1 | Additional file information
FILRUL.1 | File-based I/O rules
FLDRUL.1 | Field-based I/O rules
INDEX.1 | File key and index information
LOCAT.1 | Field locations in data records
RULE.1 | General I/O rules
TYPDEF.1 | Field-type definitions
TYPRUL.1 | Field-type I/O rules
FIELD.1 | Field information
VCOL.1 | Field information for data views
VMAIN.1 | General information for data views
VTBL.1 | File information for data views
ENCRYPTION.DD | Password for Encrypted data files.