Attributes in Xforms instances

Dear All,

I am trying to use Xforms (currently within Orbeon) to create forms for
editing HL7 MIF models.

These models basically contain all their semantic etc info (i.e. the
main information ) in attributes e.g.:

<stateTransition root="DEFN" artifact="DIM" domain="RX" name="000000"
realmNamespace="UK" stateTransitionName="activate"
className="SomeClass"/>


All the instance examples simply give examples of instance/models as
being purely element skeletons.

What is the best way for ensuring that the attribs are present etc? I
can obviously write the Xpaths relevant for attribs but again I am
basically asking wrt best practice for handling attribs.


Adam 

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