EPOC OPL Guide & Reference Glossary

call

OPL Basics

To invoke a function with its arguments. When a function is called, it returns a value.

value, function, argument

character code

OPL Basics

The number representing a letter or symbol.

character set

OPL Basics

All the letters and symbols which can be displayed.

coercion

OPL Basics

Translating from one variable type into another when required. This isn’t done always.

colour mode

Graphics and Interaction

A number representing the number of colours or greys that can be displayed. Constants for colour modes are supplied in Const.oph.

command

OPL Basics

A straightforward instruction to OPL with no return value.

value, return

commit

Data File Handling

To write the changes of a database transaction. After changes are committed, they cannot be undone (rolled back).

transaction, database

condition

OPL Basics

An expression with a logical value used for program flow control.

logical value, expression

constant

OPL Basics

Names which can be used like variables, but whose value cannot change.

content type

Advanced Topics

What sort of file a particular file is. MIME content types are written as a string such as “text/html” or “image/jpeg”.

MIME