# EPOC OPL Guide & Reference Glossary

## Index V

Term | Topic | Meaning | See Also
value | OPL Basics | What OPL understands as the value of something. Sometimes value is used interchangeably with expression, as every expression has a value. | expression
variable | OPL Basics | A name which stands for a value. A variable’s value can be changed. | value
view | Data File Handling | The representation of a table which OPL can manipulate in memory. Changes made to a view can be efficiently written into the database file in a single pass, and a view doesn’t have to represent all the data in a table. | table, database, transaction