In a Master File, you identify the name and the type of data source in a data source declaration. A data source declaration can include the following attributes:

• FILENAME, which identifies the name of the data source.
• SUFFIX, which identifies the type of data source.
• REMARKS, which allows you to provide descriptive information about the data source for display in graphical tools, such as Report Assistant and Graph Assistant.
• ACCESSFILE, which identifies the name of the optional Access File for a FOCUS data source. See Describing a FOCUS Data Source.
• DATASET, which identifies the physical file name if your data source has a non-standard name.

You can optionally specify a sliding date window that assigns a century value to dates stored with two-digit years, using these data source attributes:

• FDEFCENT, which identifies the century.
• FYRTHRESH, which identifies the year.

For more information on the sliding window technique, see the Developing Applications manual.