rollup table of Schema elements and attributes used

It seems that a common user story for our specs is:

   "is [schema feature foo] a Basic or Advanced pattern?"  

This is currently tricky to find, especially when the element name
doesn't appear in a spec, e.g. "xs:choice" doesn't appear in Basic.

Philippe suggests a rollup table of xs:schema elements and attributes
with a link to the patterns referencing them, akin to the use of
elements in the HTML spec:

http://www.w3.org/TR/html401/index/elements.html

Paul