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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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