Expression Elements

Several single properties used in schemas and filters can be combined into a mathematical expression and calculated accordingly.

TIP: Expressions passed to other expressions must be enclosed in curly braces.

For example the expression income&/1000 when passed to CalcItems would be:

CalcItems("Addresses",{income&/1000},OP_Sum,ST_Within,ST_Geometry)

A further example of this nesting of expressions is shown in the CalcItems description in the Spatial section of the Elements topic.

• Schema Columns

• Built-in properties

• Built-in functions

• Constants

• Operators

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