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this is my compiler project with my best friend Alireza Alijani .it easy change query to relation algebra picture with Latex .
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This research project seeks to use compiler techniques to perform an attribute-based data-flow analysis on (MOF/UML)models allowing for a syntax-driven validation of a model's static semantics as well as an abstract interpretation of i dynamic behavior.
The Semantic Web implementation using native xml database as backend storage. A SPARQL javacompiler to XQuery using Jena. There are XQuery scripts for native xml database Sedna(http://modis.ispras.ru/sedna/).