\begin{abstract}
\eat{XSEarch, an XML Search Engine, is presented. XSEarch has a simple
query language suitable for the naive user. It returns
documents fragments that satisfy the user's query. Query answers
are ranked using extended information retrieval techniques and are
created in the order of their ranking. 
Advanced indexing techniques were developed in order to efficiently
implement XSEarch.  Extensive experimentation has proven XSEarch to be
efficient and scalable.}
XSEarch, a semantic search engine for  XML, is presented. XSEarch has a simple
query language, suitable for a naive user. It returns semantically
related document fragments that satisfy the user's query. Query
answers are ranked using extended information-retrieval techniques and
are generated in an order similar to the ranking. Advanced indexing
techniques were developed to facilitate efficient implementation of
XSEarch. The performance of the different techniques as well as the
recall and the precision were measured experimentally. These
experiments indicate that XSEarch is efficient, scalable and
ranks quality results highly. 
\end{abstract}

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