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The following page has been changed by JakeVanderdray: http://wiki.apache.org/nutch/OntologyPlugin New page: [This text comes straight from the README.TXT written by John Xing] Ontology plugin is a contribution from Michael J Pan <[EMAIL PROTECTED]>. Currently it is used to do one kind of query refinement as implemented in refine-query-init.jsp and refine-query.jsp (both are called by search.jsp). By default, ontology plugin is compiled, but query refinement based on it is ignored in search.jsp. To enable query refinement, do the following (1) specify url(s) of owl files to property extension.ontology.urls in ./conf/nutch-default.xml (or better, ./conf/nutch-site.xml). (2) uncomment refine-query-init.jsp and refine-query.jsp in search.jsp If you want to check ontology defined by different owl file, modify property extension.ontology.urls in ./conf/nutch-default.xml (or better, ./conf/nutch-site.xml), and insert the following to ./bin/nutch: elif [ "$COMMAND" = "ontology" ] ; then for f in $NUTCH_HOME/build/plugins/ontology/*.jar; do CLASSPATH=${CLASSPATH}:$f; done CLASS='org.apache.nutch.ontology.OntologyImpl' --------------- Possible issue: --------------- If search.jsp fails with this or similar error: ...... root cause java.lang.NoSuchFieldError: actualValueType at com.hp.hpl.jena.datatypes.xsd.XSDDatatype.convertValidatedDataValue(XSDDatatype.java:371) ...... it is because jena and tomcat are using conflicting versions of the same xerces library. To solve this, one needs to update tomcat's xerces library. Here's a reference http://jena.sourceforge.net/jena-faq.html#general-1 ------------------------------------------------------- This SF.net email is sponsored by: Splunk Inc. Do you grep through log files for problems? Stop! Download the new AJAX search engine that makes searching your log files as easy as surfing the web. DOWNLOAD SPLUNK! http://sel.as-us.falkag.net/sel?cmd=lnk&kid=103432&bid=230486&dat=121642 _______________________________________________ Nutch-cvs mailing list Nutch-cvs@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/nutch-cvs
