Documentation System Guide A description of the system, and a guide to accomplishing some common goals. Reference Manual A full listing and description of the public API exported by the library. List of Extensions An ordered collection of the extensions available in the core packages. Examples A collection of examples showing how to implement various use cases. Migration Guide Summary of the way the interface changed from version 5.x. Changelog The library's version history. Other resources Forum A discussion board for asking questions and giving feedback.