Expressions are used in various places in Simulation Studio, both for writing equations to be evaluated (such as the Expression field for a Formula block) and for writing Boolean criteria to apply to attribute values (such as the Attribute Rule field for an Unbatch block, Entity Filter block, Entity Group Holder block, Resource Stats Collector block, or Resource Scheduler block, or the Attributes field of a Seize block or Release block). This appendix documents the operators and functions for Simulation Studio expressions.