[xsl] conditional processing driven by comparison

[Jean-Roch Meurisse <jrm@xxxxxxxxxxxxxxxx>]

Hi,

I've just joined the list (I'm a XSLT newbie) and can't find in the 
archives a response to my problem.
My purpose is to transform the following xml structures into  valid 
xml-schema structures.
example
<myelement name="globalConcept">
	<mychoice>
		<mygroup>
			<myelement ref="subconcept1"/>
			<myelement ref="subconcept2"/>
		</mygroup>
		<mygroup>
			<myelement ref="subconcept3"/>
			<myelement ref="subconcept4/">
		</mygroup>
		<mygroup>
			<myelement ref="subconcept3"/>
			<myelement ref="subconcept4"/>
			<myelement ref="subconcept5"/>
		</mygroup>
		<mygroup>
			<myelement ref="subconcept1"/>
			<myelement ref="subconcept2"/>
		</mygroup>
	</mychoice>
</myelement>

should be transformed to
<element name="globalConcept">
	<complexType>
		<choice>
			<sequence>
				<element ref="subconcept1"/>
				<element ref="subconcept2/>
			</sequence>
			<sequence>
				<element ref="subconcept3"/>
				<element ref="subconcept4"/>
				<element ref="subconcept5" minOccurs="0"/>
			</sequence>
		</choice>
	</complexType>
</element>

Furthermore, if all "mygroup" nodes are identical, it should produce only 
one sequence directly under the complexType element (without the choice 
element)
I would yet be satisfied with a transformation only copying group nodes but 
eliminating duplicates (in the example copying the 3 first groups and 
eliminating 4th)

thank you all in advance

JR


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