& XSLT Hi,

I am using a node in my xml to define variables. The defined variables 
are referenced by ID in another node (a project). The problem is that 
some variables have sub-ids (the variables are "buckets" instead of 
numeric values, they can have values like "high" "med" "low")

So - the xml looks like...

<meta> 
    <var name="var1" id="1"> 
          <buckets> 
                <bucket name="High" bID="10"/> 
                <bucket name="Med" bID="11"/> 
          </buckets> 
    </var> 
    <var name="var2" id="2"> 
          <buckets> 
                <bucket name="Some Value" bID="3"/> 
                <bucket name="Another Value" bID="10"/> 
          </buckets> 
    </var> 
</meta> 
<projects> 
    <project> 
        <var id="1" bID="10"/>      <!-- bID="3" should throw an error-->
    </project> 
</projects> 

I want to make sure (using xsd) that each project's variables' bID 
matches one of the available bIDs where project/var id== meta/var id. 
E.g. in above sample, if project/var id==1, then project/var bID has to 
be either "10" or "11" - or an error is thrown.

I've thought of one (rather redundant) solution - by copying the id into 
the bucket node, I can have a key/keyRef comparison with composite 
fields. E.g., xsd would read....

        <xs:key name="multiIDs"> 
            <xs:selector xpath="./meta/var/buckets/bucket"/> 
            <xs:field xpath="@bID"/> 
            <xs:field xpath="@id"/> 
        </xs:key> 
        <xs:keyref name="multiIDsRef" refer="multiIDs"> 
            <xs:selector xpath="./projects/project/var"/> 
            <xs:field xpath="@bID"/> 
            <xs:field xpath="@id"/> 
        </xs:keyref> 

and the var node would change to

    <var name="var1" id="1"> 
          <buckets> 
                <bucket name="High" bID="10" id="1"/> 
                <bucket name="Med" bID="11" id="1"/> 
          </buckets> 
    </var> 

Just hoping there's a better way than that. (Project var values can 
change over time - so there would be a lot more redundancy than shown)

Thanks for any help,

Doug
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