[news.eclipse.modeling.m2m] [ATL] Multiple Input Models Issue

[barrettr@xxxxxxxxxx (Ronan)]

Hi,
My ATL transform takes in a number of input models (WSDL interfaces) and 
produces one output model (UML Class Diagram). The problem is that each 
time the root transformation(ProcessToRoot) runs (once for every input 
model) it creates a new model in the output UML Class diagram. I want 
there to be only one output model with a number of classes in it 
representing each input interface. My attempt so far is below..

module XMLtoUML; -- Module Template
create OUT : UML from IN : XML, IN2 : XML;

rule ProcessToRoot{
	from 
		r: XML!Root		
       --merge the two input models
	using{
			a:Set(XML!Root) = 
XML!Root.allInstancesFrom('IN')->union(XML!Root.allInstancesFrom('IN2'));
		}
	to
		rt : UML!Model(
			packagedElement <- 
a->collect(e|e.children->select(e|e.name='wsdl:portType')->collect(e|thisModule.PortTypeToInterface(e)))
		)
}

lazy rule PortTypeToInterface{
	from 
		pt: XML!Element(
			pt.name = 'wsdl:portType'
		)	
	to
		inf : UML!Interface(
			name <- pt.children->select(e|e.name='name')->first().value,
			ownedOperation <- 
pt.children->select(e|e.name='wsdl:operation')->collect(e|thisModule.OperationToOperation(e))	
		)
}

lazy rule OperationToOperation{
	from 
		opx: XML!Element
	to
		opu : UML!Operation(
			name <- opx.children->select(e|e.name='name')->first().value
		)
}

I have successfully got the 2nd and 3rd rules merging correctly but need 
the first rule to only fire once in order to create only one output model. 
Any ideas?

Also is there any way to merge all input models without having to 
explicitly enumerate them as I have done with the allInstancesFrom method 
in a using block?

Cheers,
Ronan