They should not be quoted, but are expected to meet appropriate lexical rules. The compiler should balk, for instance, if a URL does not include a protocol part. Lastly, areas are identified using what is called a namestring . Namestrings are identifiers which may include underscores or dashes, or alternatively, may include spaces, commas, and other arbitrary characters, contained within double quotes. Only areas use namestrings for identifiers.
Shapes have traditional alpha-numeric identifiers.
All strings, including namestrings, are case sensitive. Number constants may be entered as real or integer. Expressions may include binary plus and minus. Program Structure A MapMurl program is composed of a series of semicolon separated statements. Each part is described below.