CSS Data Types

Hi All.
I can only find a couple of data types in http://docs.webplatform.org/wiki/css/data_types. A few questions:
1)            Am I looking in the right place for these creatures? There are many more. Need to create?
2)            Do we have a page type for CSS data types?
3)            In the spec [1] and where CSS data types are documented elsewhere [2, for example], the data types are rendered in angled brackets. Anyone know why this is?
Thanks in advance,
Eliot
[1] http://www.w3.org/TR/css3-values/
[2] https://developer.mozilla.org/en-US/docs/CSS/number