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[xsl] XSLT as a programming language for developping an expert system

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P.S. : First sorry for my English ...



XSLT as a programming language for developing an expert system
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The goal is to show that XSLT is a programming language making it possible
to develop an expert system (thanks to its inference engine) and to
implement it for the solving of a blocks world problem.

The blocks starting situation would be represented by a XML file containing
the blocks names and their higher and lower blocks (if they exist). The
objective to reach (Ex: "block A on block B and block C alone") would also
be included in a XML file.


The XLM syntax would look like this :

<Blockworld MaxFloors="0" TableSize="0">
	<Block Name="a">
		<Upperblock>b</Upperblock>
	</Block>

	<Block Name="b">
		<Upperblock>b</Upperblock>
		<Lowerblock>a</Lowerblock>
	</Block>
</Blockworld>



The rules that will have to be used by the expert system (Ex: "if block A
free then take it and put it on the table"; "if block A on block B in the
objective then [if free] put A on B") would be represented in a XML file
(RuleML format?).


Thus the system would work as follow :
Step-by-step (for each pass), rule(s) that the XSLT inference engine chooses
(by a template-match) are applied to the tree representing the blocks world,
leading to the objective.



My problems are :

- How to implement this idea concretely ?
(- How to optimize the rules to solve this problem ?)


Do you see any ideas that could maybe help me developing this ? 
Thanks !

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