xpath access control

[Wolfgang Schreiner <wolfgang.schreiner@ec3.at>]

Hi all,

Following problem: I would like to control access to a set of XML
documents via XPath 2.0 queries. XML fragements, which are allowed to
being accessed are specified by XPath 2.0 statements as well. What I
need is a method to determine whether 2 XPath statements are
semantically equal or similar, before executing the query and having to
post-filter the result. What is the best way to achieve this? Does the
XACML xpath-node-match function solve this problem?  Is there an
implementation to it? I think the Sun implementation does not include
XPath functions?

-- 

  best regards,

  Wolfgang Schreiner, Mag. DI
  E-Commerce Competence Center (EC3)
  Donau-City Strasse 1, A - 1220 Vienna

  Tel: +43 1 522 71 71 - 14
  Fax: +43 1 522 71 71 - 71
  Web: http://www.ec3.at