Symbols in Named Expressions
Symbols in named expressions are values and properties. Each symbol is derived from one of the following types of sources:
- Application-defined value — for example, System.Math.PI.
- Application-defined method — for example, System.Math.Sin(a).
- Access string — contains no blanks, operators, or parameters. For example: ActiveFile.Author.
Symbols are grouped in symbol sets. Symbol sets are published by applications called symbol providers. A standard collection of symbol sets is built into this product, such as
- System.Math — standard math function symbols, including Sin(), Cos(), and others.
- Session — session-specific symbols, including ActiveCommandKeyin(), ActiveModelIs3D(), isNamedToolBoxOpened(), and others.
When you define a named expression, you should only specify the symbol sets required to generate the expression in order to minimize processing overhead.