Document template created by FormDocs, a program used for creating structured forms; may contain multiple forms, each of which stores the layout and fields for the form; can include labels, checkboxes, text boxes, and other page design elements for each form.

FormDocs templates are used for generating FormDocs forms (.FDD files), which can be filled by the user.

File used by Cognos Impromptu, a program used for generating reports from various data sources; saves database information and is created when Impromptu opens an .INI file that contains information about a database supported by the software.

Function description table files are used for caching information about underlying data sources.

Data file used by Lucene, a text searching library written in Java; contains "stored fields," which are text strings that are saved in the search index; used for saving text that can be searched using the Lucene search engine.