Re: ODD constrained attribute class membership

Immediately after  pressing "send" on my previous reply, I thought of  a 
much more elegant solution, in which att.xyz inherits y and z from 
att.yz and completes them with x. Like this


             <classSpec type="atts" ident="att.xy">
                <desc>provides two attributes</desc>
               <attList>
                <attDef ident="y">
                   <desc>the y attribute</desc>
                   <datatype>
                      <dataRef name="NCName"/>
                   </datatype>
                </attDef>
                <attDef ident="z">
                   <desc>the z attribute</desc>
                   <datatype>
                      <dataRef name="NCName"/>
                   </datatype>
                </attDef>
                </attList>
             </classSpec>

             <classSpec type="atts" ident="att.xyz">
                <desc>provides three attributes</desc>
                <classes>
                   <memberOf key="att.xy"/>
                </classes>
                <attList>
                   <attDef ident="x">
                      <desc>the x attribute</desc>
                      <datatype>
                         <dataRef name="NCName"/>
                      </datatype>
                   </attDef>
                </attList>
             </classSpec>

That seems to work. An element which says it is a member of att.xy will 
get attributes x and y, while one that says it's a member of att.xyz 
will get x, y, and z.




  On 20/01/17 09:06, Benjamin W. Bohl wrote:
> Der TEI community,
>
> I’m currently working on a schema definition using ODD and have some attributes defined in a class. Now I want to define an element that allows only certain attributes of that class.
> I tried using @exclude in the memberOf definition but that didn’t work. So I came up with the idea to use attest/attRef and reference the specific attribute I want to allow. That would work if there was another element being a member of the specified class but all elements use only certain attributes of that class…
>
> The attribute class is att.linking and should group all attributes that hold references to uri:s, other elements and the like. At the moment it holds only two attributes ‘uri’ and ‘name.ref’ (referencing another elements @name – comparable to referencing xml:id but not not constrained to the uniqueness of xml:id across a xml file). More attributes might come up that would fit in this class.
>
> Is there a technical solution to this or is it rather a modelling problem?
> In any case, maybe you could help me with some ideas of how to tackle this problem!
>
> Many thanks,
> Benjamin