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http://xml.apache.org/xindice/
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http://www.rpbourret.com/xml/XMLAndDatabases.
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3. Bourret, R. (2007) XML Database Products. Available at
http://www.rpbourret.com/xml/XMLDatabaseProds.htm
4. CellStore Homepage (2007)
http://cellstore.felk.cvut.cz/wiki
5. Gövert, N. and Kazai, G. (2002) Overview of the INitiative for the Evaluation of XML retrieval (INEX) 2002. In: Proc. of the first Workshop of the INitiative for the Evaluation of XML Retrieval (INEX), Dagstuhl, pp. 1–17.