Binary Information Press
In XML information retrieval systems, storage engine and search engine are the two key components. The storage engine manages all persistent data structures and index structures which are used for facilitating query execution. The search engine is above the storage engine and its main work is finding out the candidate query results and ranking the candidate results by the queries. In this paper, the authors build up the index structure based on the XN-Store, which is a native XML data storage scheme proposed by them, for efficient XML data storage and retrieval.