The Common Expression Language specification is a formal standard for a non-Turing-complete expression language designed for safe, portable, and fast logic evaluation. It serves as a cross-language logic standard and a declarative policy language, providing a consistent semantic framework for executing boolean expressions and data transformations across different programming environments.
This specification acts as an embedded expression engine that allows applications to integrate portable logic for evaluating user-defined configurations. It is specifically designed to enable safe user-defined configuration and the enforcement of declarative security policies and access control.
The framework covers the standardization of cross-language logic, dynamic predicate evaluation, and the embedding of expression logic within applications. It provides a means to validate expression syntax and define execution environments for consistent type safety and resolution.
