Workshop on Databases and Programming Languages (DBPL 2001),
LNCS 2397, Springer,
A Rule-based Querying and Updating Language for XML
We present XPathLog as a Datalog-style extension to XPath. The
querying part extends XPath with binding multiple variables to XML
nodes which are "traversed" when evaluating an XPath expression.
Data manipulation is done in a rule-based way. In contrast to other
approaches, the XPath-based syntax and semantics is also used for a
declarative specification how the database should be updated:
XPath filters are interpreted as specifications of elements and
properties which should be added to the database. In this paper, we
focus on the theoretical aspects of XPathLog. XPathLog has been
implemented in the LoPiX system.
Extended versions can be found in the
Habilitation thesis and in
Theory and Practice of Logic Programming, 2004.
Further documentation can be found on the
LoPiX project homepage.