Navigation Implementation for XQuery in OrientX

Recently, much work bas been concentrated on XQuery implementation and optimization and there is an active debate over what are the best techniques for implementing XQuery In this paper a grammatical algebra, called XAlgebra is proposed The algebra is implemented in OrientX, a native XML database system XAlgebra is used to interpret XQuery query, define its semantics and describe the query plan in the internal of query engine A brief summary of XQuery implementation is also provided