Questions on 1.1 schema

Preliminary work in my UML tools raised a couple of questions, the
    first one of which should be checked in the pending schema upload.

    
      
All classes that have a value have associated both
        facets and objAttrs, EXCEPT for complex type "real" which does
        not have a facet - only objAttr. It would seem that it should
        have both.

      
There is no obvious inheritance in the schema (can address in
        review), just a single class (effectively ObixObject) with a lot
        of associated classes; the associated classes do not inherit
        from obj as in Figure 1 WD12.

      
There is no optionality in the schema; all items appear to be
        cardinality 1.. except for the ObixObjects (not the actual name)
        that are in lists.

      

      
The schema does not appear to correspond directly to Figure 1
        in WD12 (just posted by Craig - see PDF line 473, section 4
        Object Model, and the drawings that Chris and the rest of us
        have circulated/discussed 

    
    
Thanks!

    

    
bill

    

    
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      William Cox
      

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