- provide means to build a wheel with mypyc
- declare the API as stable, from now on new features should be released under a "preview" notion
- remove all remaining deprecated features
- performance optimizations
- a proper serialization implementation with focus on performance and possibly extendability
- a general query interface
- with some simple/performant queries (find[_following|preceding] based on names and/or attributes)
- translation of XPathExpressions to such when applicable
- an independent parser implementation
- without any DTD support
- inclusion of a RelaxNG validator
- grown in an extra package