Edward Barkmeyer Evan K. Wallace Ravi Raman NIST "Position Paper" for the W3C Workshop on Rule Languages for Interoperability. 2005 conf/w3c/2005r Rule Languages for Interoperability http://www.w3.org/2004/12/rules-ws/paper/61 db/conf/w3c/rules2005.html#BarkmeyerWR05