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How to mix in model elements in refining mode [message #986182]

Mon, 19 November 2012 06:01

Eclipse User

I have a simple UML model with some predefined types and would like to reverse engineer a DTD and link it to these types. I have a regular transformation that transforms the DTD structure to UML, but get hung up on linking the two.

I am aware that this requires a refining transform, but it seems that the refining transform does not trigger on multiple source models. In the example below, the File2Package rule is never called. I have seen the example for the model augmentation, but it seems somewhat clumsy in syntactic terms.

Am I missing something or can the basic rule construct as shown not be used? If so, why? If it can, can someone please point me to an example?

-- @atlcompiler atl2010
-- @nsURI UML=http://jgsuess.net/uml14
-- @nsURI DTD=DTD.xmi

module transform;
create OUT: UML refining IN: UML, dtd: DTD;

rule File2Package {
	from
		f: DTD!DTDFile
	to
		p: UML!Package
}

Re: How to mix in model elements in refining mode [message #986185 is a reply to message #986182]

Mon, 19 November 2012 06:08

Eclipse User

No matter what you type for the type of the first element of a refining rule, it will always be the type of the input element.
So if you want to create a Package when it detects a DTDFile you should use this construct :

rule File2Package {
	from
		f: DTD!DTDFile
	to
		t : DTDFile,
		p: UML!Package()
}

Re: How to mix in model elements in refining mode [message #986187 is a reply to message #986185]

Mon, 19 November 2012 06:19

Eclipse User

Hi, I have attempted to insert your snippet and it comes up with a syntax error on the comma after

t : DTDFile,

. Apart from that could you please define Quote:

the input element

for me? Does this mean that the rule will only ever match on model elements on

IN

, and all other models are never declaratively matched and can only be drawn in by navigation?

Re: How to mix in model elements in refining mode [message #986188 is a reply to message #986187]

Mon, 19 November 2012 06:25

Eclipse User

Ok, roll back, the example works if you add the namespace prefix.

Re: How to mix in model elements in refining mode [message #986189 is a reply to message #986188]

Mon, 19 November 2012 06:27

Eclipse User

Thanks, got the direction now. Great advice.

Re: How to mix in model elements in refining mode [message #986190 is a reply to message #986189]

Mon, 19 November 2012 06:29

Eclipse User

Essentially this means that the creation of the actual output element is a side-effect of the creation of a ghost element in the mix in-model. Surprising. I guess should have read the semantics paper. Sad

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