# IQL Reference

> Complete IS Tools IQL function reference. Browse all functions alphabetically with syntax, usage context tables, and code examples for rules and forms.

This is a reference of all IQL functions and operators. Note that they are case insensitive.

## Sections

Each section is a separate file:

- [Functions](iql_references/functions.md)
- [Properties](iql_references/properties.md)
- [Commands](iql_references/commands.md)
- [Operators](iql_references/operators.md)
- [Comparison of string operators](iql_references/comparison_of_string_operators.md)
- [Null](iql_references/null.md): Null represents the explicit absence of a value.