[XML-DEV Mailing List Archive Home] [By Thread] [By Date] [Recent Entries] [Reply To This Message] RE: Predicate Logic in XML (was Re: [ANN]: SIX)
Hi, On the subject of logic in XML, below is what I used for an Expert System on the Palm. "domain" refers to the knowledge domain, BTW. Note the decidedly non-conformant title line at the top of the example document - having any number of Memos with the name "<?xml version='1.0' en..." didn't seem like a good idea, whatever the spec says. I was intending to generalise it (as a Schema), but never got around to it... <?xml encoding="UTF-8"?> <!-- DTD for KVM Expert System Knowledge Base Domains --> <!ELEMENT domain (fact+,rule+)> <!ATTLIST domain name CDATA #REQUIRED> <!ELEMENT fact (#PCDATA)> <!ATTLIST fact goal (true | false) "false"> <!ATTLIST fact question (true | false) "false"> <!ATTLIST fact negated (true | false) "false"> <!ELEMENT rule (fact,condition+)> <!ELEMENT condition (#PCDATA)> <!ATTLIST condition negated (true | false) "false"> Kex "Example" <?xml version='1.0' encoding='UTF-8'?> <!DOCTYPE domain SYSTEM "kex.dtd"> <domain name="Test Data"> <!-- *** facts *** --> <fact goal="true">Stone</fact> <fact goal="true">Helicopter</fact> <fact goal="true">Bird</fact> <fact goal="true">Mouse</fact> <fact question="true">Is it alive</fact> <fact question="true">Can it fly</fact> <fact>alive</fact> <!-- *** rules *** --> <rule> <fact>Helicopter</fact> <condition negated="true">alive</condition> <condition>Can it fly</condition> </rule> <rule> <fact>Stone</fact> <condition negated="true">alive</condition> <condition negated="true">Can it fly</condition> </rule> <rule> <fact>Mouse</fact> <condition negated="true">Can it fly</condition> <condition>alive</condition> </rule> <rule> <fact>alive</fact> <condition>Is it alive</condition> </rule> </domain> > -----Original Message----- > From: Henry S. Thompson [mailto:ht@c...] > Sent: 08 January 2001 20:13 > To: Peter Jones > Cc: 'xml-dev@l...' > Subject: Predicate Logic in XML (was Re: [ANN]: SIX) > > > You might like to have a look at this work by Drew McDermott [1] which > has some similarities to your SIX proposal. > > ht > > [1] http://www.cs.yale.edu/homes/dvm/daml/proposal.html > -- > Henry S. Thompson, HCRC Language Technology Group, University > of Edinburgh > W3C Fellow 1999--2001, part-time member of W3C Team > 2 Buccleuch Place, Edinburgh EH8 9LW, SCOTLAND -- (44) 131 650-4440 > Fax: (44) 131 650-4587, e-mail: ht@c... > URL: http://www.ltg.ed.ac.uk/~ht/ >
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