- Language Reference & Tutorials
- A collection of documents describing, in detail, the various conceptual parts of the language.
- Type Reference
- Index of built-in classes and roles.
- Routine Reference
- Index of built-in subroutines and methods.
You may also be interested in the Perl 6 design documents, which are in some places more complete than this documentation, but targeted toward compiler writers rather than users of the language. Documentation for the different but related Perl 5 language can be found here.