- implement counted transitions at the automata level

- Unicode:

  + upgrade to 3.2

  + improve the python script to generate better test

    expressions to check the list of ranges.

- Implement the interface at the SAX level

- Implement the missing parts in the Structure part

   + all content model

   + enumerations

   + countless others c.f. the TODO scattered in the code

- Complete the Built-In datatype collections and Facets implementations

- Regression tests based on

  + the primer:

    http://www.w3.org/TR/xmlschema-0/

  + the Schemas Test Collection:

    http://www.w3.org/2001/05/xmlschema-test-collection/

  + archives of the schemas-dev list

- Integrity constraints:

  + what's that ? How need to read about it

- "formal" checking, i.e. go through the full Structure spec and

  bind code and associated parts of the Schemas spec

- go though the erratas

  http://www.w3.org/2001/05/xmlschema-errata