Chapter 18 Functions This chapter explains how to work with functions in TIBCO BusinessEvents. Topics • Overview of Catalog Functions • Built-in Functions • Custom Functions • Ontology Functions • Enabling Extended Functions • Function Tooltips and Decorations • Temporal Functions and Their Parameters • Virtual Rule Functions and VRF Catalog Functions • Cache Related Functions • Indexing for More Efficient Cache Queries • Oracle Coherence Cache Query Functions • Structure of a Function Catalog