# EPOC OPL Guide & Reference Glossary

## Index F

Term | Topic | Meaning | See Also
field | Data File Handling | An item which can be filled in for each record in a database. Fields correspond to the columns in the table model of databases. | database, record, table, view
file extension | Advanced Topics | Everything after the final dot in a filename. Sometimes used to show the type of a file, although this is not necessary with native EPOC files (those with UIDs). | UID, MIME
floating-point | OPL Basics | A 64-bit signed floating-point value. | value, denormal
function | OPL Basics | A command with a return value. Functions can be used anywhere OPL expects a value. | value, return, argument