@article{(Open Science Index):https://publications.waset.org/pdf/11227,
	  title     = {Multi-level Metadata Integration System: XML, RDF and RuleML},
	  author    = {Messaouda Fareh and  Omar Boussaid and  Rachid Challal},
	  country	= {},
	  institution	= {},
	  abstract     = {Our work is part of the heterogeneous data
integration, with the definition of a structural and semantic mediation
model. Our aim is to propose architecture for the heterogeneous
sources metadata mediation, represented by XML, RDF and RuleML
models, providing to the user the metadata transparency. This, by
including data structures, of natures fundamentally different, and
allowing the decomposition of a query involving multiple sources, to
queries specific to these sources, then recompose the result.},
	    journal   = {International Journal of Computer and Information Engineering},
	  volume    = {6},
	  number    = {2},
	  year      = {2012},
	  pages     = {249 - 254},
	  ee        = {https://publications.waset.org/pdf/11227},
	  url   	= {https://publications.waset.org/vol/62},
	  bibsource = {https://publications.waset.org/},
	  issn  	= {eISSN: 1307-6892},
	  publisher = {World Academy of Science, Engineering and Technology},
	  index 	= {Open Science Index 62, 2012},