A System for Storing, Retrieving, Organizing and Managing Web Services Metadata Using Relational Database*

In this paper we present our system for efficient storage, update, and retrieval of web service metadata documents in relational database. Initially we investigate all of the existing approaches for efficient storage and retrieval of XML documents in relational database. As a result we selected a recently proposed structure-centered storage schema named DLN (Dynamic Level Numbering). As there is no freely available implementation of DLN method, as in its original form it does not support namespaces, and as the web services metadata documents rely heavily on namespaces we created our own clean-room implementation that we extended to support XML namespaces.