Relational algebra has been a crucial foundation for relational database systems, and has played a large role in enabling their success. A corresponding XML algebra for XML query processing has been more elusive, due to the comparative complexity of XML, and its history. We argue that having a sound algebraic basis remains important nonetheless. In this paper, we show how the complexity of XML ...

CL Research’s question-answering system for TREC 2003 was modified away from reliance on database technology to the core underlying technology of using massive XML-tagging for processing both questions and documents. This core technology was then extended to participate in the novelty task. This technology provides many opportuinities for experimenting with various approaches to question answer...

Active XML (AXML) is an extension of XML to exploit the powerful computation ability of peer-to-peer network and Web services technologies. AXML is considered a distributed XML DBMS which extends the capability of XML by embedding intensional XML data inside XML documents. The management of intensional XML and XML data together in XML documents raises issues such as representation for intension...