Indexing proposals updated

I have uploaded to 
the TC archive slightly updated versions of the DITA 1.1 indexing proposals. A 
brief summary of changes:

  
All 3 documents: 
  fixed DTD typos. The indexing-d-index-base parameter entity was 
  missing the  index-sort-as element (thanks, Don), and the class 
  attributes were missing a trailing space (Thanks, 
  Robert).

  
Issue 45a: Add 
  sort order indexing element: renamed index-sort-order to index-sort-as, as we 
  discussed. There was some talk about confusion regarding the terminology. I 
  also reworded the second sentence to make the meaning hopefully clearer: "This 
  proposal addresses the ability to specify a sort phrase under which an index 
  entry would be sorted". 

  
Issue 45b: Add 
  page range indexing elements: there were objections that an ending page range 
  marker should not generate an index entry. I have added clarification to that 
  effect.

Chris