Values for property expressions are calculated at runtime. Values returned by property expressions must match the data type specified for the object property.

For information about objects, their properties, and required data types, see Appendix A. For information about data types, casts, casting functions, and data formats, see Appendix B. For a description of the syntax for event functions, see Appendix D.

The following sections provide information about operators you can use in property expressions, and about built-in and user-defined functions:

• "Operators"
• "Built-in Functions"
• "User-Defined Functions"