title: integrating mining with relational database systems : alternatives and implications. authors: shiby thomas , rakesh agrawal , sunita sarawagi. venue: sigmod conference. year: 1998
title: storing and querying ordered xml using a relational database system. authors: igor tatarinov , stratis d. viglas , kevin beyer , jayavel shanmugasundaram , eugene shekita , chun zhang. venue: international conference on management of data. year: 2002