DataStore is a Java based document repository server for storing, querying and fetching XML based documents. It is built on practical needs allowing the storage of semi-structured (well formatted, maybe validated, XML, XHTML and HTML) documents and un-structured documents (TXT). The documents are stored in conventional relational database assuring that way the maximum advantages and reliability of these products. Being built on top of the Avalon Phoenix framework, it allows server components to be easily developed, deployed and shared. The documents are managed through a BEEP and/or XML-RPC interface using a subset of the SEP (Simple Exchange Profile) protocol.