Hi Andy,
I didn't have the '--verbose' flag set when I created the logs for the previous
message so I didn't get the update query that caused the exception. However
I've tried again with verbose logging, and managed to get the exception thrown
for the select query. The queries *should* be valid SPARQL (they're run several
times in our system), but I will get some better logs asap.
In this case, I have an update which returns HTTP 200:
INSERT {
?subject hc:associatedWith hc:633 ;
} WHERE {
?subject ?p ?o
FILTER ( ?subject = hc:90623 ) }
Then the next select query triggers the ConcurrentModificationException in my
last message.
Sorry for the vagueness. I will try to isolate the conditions tomorrow.
Thanks,
Stuart.
________________________________________
From: Andy Seaborne <[email protected]>
Sent: 27 August 2013 21:36
To: [email protected]
Subject: Re: Fuseki concurrency problems: text search + inference
Stuart - quick question - and from code review, not use test running ...
What was the update? Could it be that there was a syntax error in it?
Andy
On 27/08/13 18:16, Stuart Taylor wrote:
> Hi all,
>
> I'm having some more problems with Fuseki and full text search. I have
> an InfModel backed by a TDB dataset, which I've added a Lucene text
> index to. I'm having problems with updates and select queries resulting
> in exceptions being thrown by Fuseki.
>
> I am running Fuseki 0.2.8-SNAPSHOT 20130826-0756 which should include
> the fixes for JENA-522 (where I was having problems earlier).
>
> Unfortunately I haven't managed to come up with a complete running
> example which reproduces the problem, but while I do that the stack
> traces from Fuseki's log might be able to shed some light on what is
> happening. I have also added the assembler file for my Fuseki set up at
> the end of this message.
>
> After some SPARQL Update queries I occasionally get:
>
> 17:43:33 WARN DatasetGraphText :: Exception in abort: Can't abort a
> write lock-transaction
> com.hp.hpl.jena.sparql.JenaTransactionException: Can't abort a write
> lock-transaction
> at
> com.hp.hpl.jena.sparql.core.DatasetGraphWithLock._abort(DatasetGraphWithLock.java:100)
>
> at
> com.hp.hpl.jena.sparql.core.DatasetGraphTrackActive.abort(DatasetGraphTrackActive.java:56)
>
> at
> org.apache.jena.query.text.DatasetGraphText.abort(DatasetGraphText.java:139)
>
> at
> org.apache.jena.fuseki.servlets.HttpAction.abort(HttpAction.java:142)
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.execute(SPARQL_Update.java:248)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.executeForm(SPARQL_Update.java:212)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.perform(SPARQL_Update.java:110)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.executeLifecycle(SPARQL_ServletBase.java:184)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.executeAction(SPARQL_ServletBase.java:165)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.execCommonWorker(SPARQL_ServletBase.java:153)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.doCommon(SPARQL_ServletBase.java:73)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.doPost(SPARQL_Update.java:80)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
> at
> org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:457)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)
>
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
>
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
>
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
>
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
>
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
>
> at org.eclipse.jetty.server.Server.handle(Server.java:370)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
>
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
>
> at
> org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960)
>
> at
> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021)
>
> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
> at
> org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
>
> at
> org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.run(BlockingChannelConnector.java:298)
>
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
>
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
>
> at java.lang.Thread.run(Thread.java:722)
> 17:43:33 WARN HttpAction :: Transaction still active in
> endWriter - no commit or abort seen (forced abort)
> 17:43:33 WARN DatasetGraphText :: Exception in abort: this
> IndexWriter is closed
> org.apache.lucene.store.AlreadyClosedException: this IndexWriter is closed
> at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:614)
> at org.apache.lucene.index.IndexWriter.ensureOpen(IndexWriter.java:628)
> at org.apache.lucene.index.IndexWriter.rollback(IndexWriter.java:1974)
> at
> org.apache.jena.query.text.TextIndexLucene.abortIndexing(TextIndexLucene.java:107)
>
> at
> org.apache.jena.query.text.DatasetGraphText.abort(DatasetGraphText.java:137)
>
> at
> org.apache.jena.fuseki.servlets.HttpAction.endWrite(HttpAction.java:153)
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.execute(SPARQL_Update.java:257)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.executeForm(SPARQL_Update.java:212)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.perform(SPARQL_Update.java:110)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.executeLifecycle(SPARQL_ServletBase.java:184)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.executeAction(SPARQL_ServletBase.java:165)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.execCommonWorker(SPARQL_ServletBase.java:153)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.doCommon(SPARQL_ServletBase.java:73)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Update.doPost(SPARQL_Update.java:80)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:755)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
> at
> org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:457)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)
>
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
>
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
>
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
>
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
>
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
>
> at org.eclipse.jetty.server.Server.handle(Server.java:370)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
>
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
>
> at
> org.eclipse.jetty.server.AbstractHttpConnection.content(AbstractHttpConnection.java:960)
>
> at
> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.content(AbstractHttpConnection.java:1021)
>
> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:865)
> at
> org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:240)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
>
> at
> org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.run(BlockingChannelConnector.java:298)
>
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
>
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
>
> at java.lang.Thread.run(Thread.java:722)
>
> Then running SELECT queries shortly after results in:
>
> 17:46:23 WARN Fuseki :: [13] RC = 500 : Iterator: started
> at 24, now 30
> java.util.ConcurrentModificationException: Iterator: started at 24, now 30
> at
> com.hp.hpl.jena.tdb.sys.DatasetControlMRSW.policyError(DatasetControlMRSW.java:157)
>
> at
> com.hp.hpl.jena.tdb.sys.DatasetControlMRSW.access$000(DatasetControlMRSW.java:32)
>
> at
> com.hp.hpl.jena.tdb.sys.DatasetControlMRSW$IteratorCheckNotConcurrent.checkCourrentModification(DatasetControlMRSW.java:110)
>
> at
> com.hp.hpl.jena.tdb.sys.DatasetControlMRSW$IteratorCheckNotConcurrent.hasNext(DatasetControlMRSW.java:118)
>
> at org.apache.jena.atlas.iterator.Iter$4.hasNext(Iter.java:312)
> at org.apache.jena.atlas.iterator.Iter$4.hasNext(Iter.java:312)
> at org.apache.jena.atlas.iterator.Iter$4.hasNext(Iter.java:312)
> at org.apache.jena.atlas.iterator.Iter.hasNext(Iter.java:910)
> at
> com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
>
> at
> com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
> at
> com.hp.hpl.jena.util.iterator.NiceIterator$1.hasNext(NiceIterator.java:103)
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.TopLevelTripleMatchFrame.nextMatch(TopLevelTripleMatchFrame.java:55)
>
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.run(LPInterpreter.java:330)
>
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.LPInterpreter.next(LPInterpreter.java:192)
>
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.Generator.pump(Generator.java:250)
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.Generator.pump(Generator.java:237)
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.LPBRuleEngine.pump(LPBRuleEngine.java:308)
>
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.moveForward(LPTopGoalIterator.java:109)
>
> at
> com.hp.hpl.jena.reasoner.rulesys.impl.LPTopGoalIterator.hasNext(LPTopGoalIterator.java:222)
>
> at
> com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
>
> at
> com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
>
> at
> com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
>
> at
> com.hp.hpl.jena.util.iterator.WrappedIterator.hasNext(WrappedIterator.java:90)
>
> at
> com.hp.hpl.jena.util.iterator.FilterIterator.hasNext(FilterIterator.java:54)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterTriplePattern$TripleMapper.hasNextBinding(QueryIterTriplePattern.java:151)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterRepeatApply.hasNextBinding(QueryIterRepeatApply.java:81)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIterBlockTriples.hasNextBinding(QueryIterBlockTriples.java:64)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:40)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:40)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorWrapper.hasNextBinding(QueryIteratorWrapper.java:40)
>
> at
> com.hp.hpl.jena.sparql.engine.iterator.QueryIteratorBase.hasNext(QueryIteratorBase.java:112)
>
> at
> com.hp.hpl.jena.sparql.engine.ResultSetStream.hasNext(ResultSetStream.java:75)
>
> at
> com.hp.hpl.jena.sparql.resultset.ResultSetMem.<init>(ResultSetMem.java:97)
> at
> com.hp.hpl.jena.query.ResultSetFactory.makeRewindable(ResultSetFactory.java:420)
>
> at
> com.hp.hpl.jena.sparql.resultset.TextOutput.write(TextOutput.java:149)
> at
> com.hp.hpl.jena.sparql.resultset.TextOutput.write(TextOutput.java:132)
> at
> com.hp.hpl.jena.sparql.resultset.TextOutput.write(TextOutput.java:120)
> at
> com.hp.hpl.jena.sparql.resultset.TextOutput.format(TextOutput.java:67)
> at
> com.hp.hpl.jena.query.ResultSetFormatter.out(ResultSetFormatter.java:135)
> at
> org.apache.jena.fuseki.servlets.ResponseResultSet$3.output(ResponseResultSet.java:238)
>
> at
> org.apache.jena.fuseki.servlets.ResponseResultSet.output(ResponseResultSet.java:283)
>
> at
> org.apache.jena.fuseki.servlets.ResponseResultSet.textOutput(ResponseResultSet.java:244)
>
> at
> org.apache.jena.fuseki.servlets.ResponseResultSet.doResponseResultSet$(ResponseResultSet.java:145)
>
> at
> org.apache.jena.fuseki.servlets.ResponseResultSet.doResponseResultSet(ResponseResultSet.java:88)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Query.sendResults(SPARQL_Query.java:348)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Query.execute(SPARQL_Query.java:244)
> at
> org.apache.jena.fuseki.servlets.SPARQL_Query.executeWithParameter(SPARQL_Query.java:195)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Query.perform(SPARQL_Query.java:80)
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.executeLifecycle(SPARQL_ServletBase.java:184)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.executeAction(SPARQL_ServletBase.java:165)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.execCommonWorker(SPARQL_ServletBase.java:153)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_ServletBase.doCommon(SPARQL_ServletBase.java:73)
>
> at
> org.apache.jena.fuseki.servlets.SPARQL_Query.doGet(SPARQL_Query.java:61)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:735)
> at javax.servlet.http.HttpServlet.service(HttpServlet.java:848)
> at
> org.eclipse.jetty.servlet.ServletHolder.handle(ServletHolder.java:684)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1448)
>
> at
> org.eclipse.jetty.servlets.UserAgentFilter.doFilter(UserAgentFilter.java:82)
>
> at org.eclipse.jetty.servlets.GzipFilter.doFilter(GzipFilter.java:294)
> at
> org.eclipse.jetty.servlet.ServletHandler$CachedChain.doFilter(ServletHandler.java:1419)
>
> at
> org.eclipse.jetty.servlet.ServletHandler.doHandle(ServletHandler.java:455)
> at
> org.eclipse.jetty.server.session.SessionHandler.doHandle(SessionHandler.java:229)
>
> at
> org.eclipse.jetty.server.handler.ContextHandler.doHandle(ContextHandler.java:1075)
>
> at
> org.eclipse.jetty.servlet.ServletHandler.doScope(ServletHandler.java:384)
> at
> org.eclipse.jetty.server.session.SessionHandler.doScope(SessionHandler.java:193)
>
> at
> org.eclipse.jetty.server.handler.ContextHandler.doScope(ContextHandler.java:1009)
>
> at
> org.eclipse.jetty.server.handler.ScopedHandler.handle(ScopedHandler.java:135)
>
> at
> org.eclipse.jetty.server.handler.HandlerWrapper.handle(HandlerWrapper.java:116)
>
> at org.eclipse.jetty.server.Server.handle(Server.java:370)
> at
> org.eclipse.jetty.server.AbstractHttpConnection.handleRequest(AbstractHttpConnection.java:489)
>
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handleRequest(BlockingHttpConnection.java:53)
>
> at
> org.eclipse.jetty.server.AbstractHttpConnection.headerComplete(AbstractHttpConnection.java:949)
>
> at
> org.eclipse.jetty.server.AbstractHttpConnection$RequestHandler.headerComplete(AbstractHttpConnection.java:1011)
>
> at org.eclipse.jetty.http.HttpParser.parseNext(HttpParser.java:644)
> at
> org.eclipse.jetty.http.HttpParser.parseAvailable(HttpParser.java:235)
> at
> org.eclipse.jetty.server.BlockingHttpConnection.handle(BlockingHttpConnection.java:72)
>
> at
> org.eclipse.jetty.server.nio.BlockingChannelConnector$BlockingChannelEndPoint.run(BlockingChannelConnector.java:298)
>
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool.runJob(QueuedThreadPool.java:608)
>
> at
> org.eclipse.jetty.util.thread.QueuedThreadPool$3.run(QueuedThreadPool.java:543)
>
> at java.lang.Thread.run(Thread.java:722)
> 17:46:23 INFO Fuseki :: [13] 500 Iterator: started at 24,
> now 30 (25 ms)
>
>
> Here is the assembler file:
>
> @prefix : <#> .
> @prefix fuseki:
> <http://jena.apache.org/fuseki#><http://jena.apache.org/fuseki#> .
> @prefix rdf:
> <http://www.w3.org/1999/02/22-rdf-syntax-ns#><http://www.w3.org/1999/02/22-rdf-syntax-ns#>
> .
> @prefix rdfs:
> <http://www.w3.org/2000/01/rdf-schema#><http://www.w3.org/2000/01/rdf-schema#>
> .
> @prefix tdb:
> <http://jena.hpl.hp.com/2008/tdb#><http://jena.hpl.hp.com/2008/tdb#> .
> @prefix ja:
> <http://jena.hpl.hp.com/2005/11/Assembler#><http://jena.hpl.hp.com/2005/11/Assembler#>
> .
> @prefix text:
> <http://jena.apache.org/text#><http://jena.apache.org/text#> .
> @prefix dc: <http://purl.org/dc/terms/><http://purl.org/dc/terms/> .
>
> [] rdf:type fuseki:Server ;
> # Timeout - server-wide default: milliseconds.
> # Format 1: "1000" -- 1 second timeout
> # Format 2: "10000,60000" -- 10s timeout to first result, then 60s
> timeout to for rest of query.
> # See java doc for ARQ.queryTimeout
> ja:context [ ja:cxtName "arq:queryTimeout" ; ja:cxtValue
> "12000,50000" ] ;
>
> fuseki:services (
> <#service1>
> ) .
>
> # Custom code.
> [] ja:loadClass "com.hp.hpl.jena.tdb.TDB" .
>
> # TDB
> tdb:DatasetTDB rdfs:subClassOf ja:RDFDataset .
> tdb:GraphTDB rdfs:subClassOf ja:Model .
>
> ## Initialize text query
> [] ja:loadClass "org.apache.jena.query.text.TextQuery" .
> # A TextDataset is a regular dataset with a text index.
> text:TextDataset rdfs:subClassOf ja:RDFDataset .
> # Lucene index
> text:TextIndexLucene rdfs:subClassOf text:TextIndex .
>
> ## ---------------------------------------------------------------
> ## Service with only SPARQL query on an inference model.
> ## Inference model bbase data in TDB.
>
> <#service1> rdf:type fuseki:Service ;
> rdfs:label "TDB/text service" ;
> fuseki:name "dataset" ; # http://host/dataset
> fuseki:serviceQuery "query" ;
> fuseki:serviceUpdate "update" ;
> fuseki:serviceUpload "upload" ;
> fuseki:serviceReadWriteGraphStore "data" ;
> fuseki:serviceReadGraphStore "get" ;
> fuseki:dataset <#dataset_fulltext> ;
> .
>
> <#dataset_inf> rdf:type ja:RDFDataset ;
> ja:defaultGraph <#model_inf> .
>
> <#model_inf> rdf:type ja:Model ;
> ja:baseModel <#tdbGraph> ;
> ja:reasoner [ ja:reasonerURL
> <http://jena.hpl.hp.com/2003/OWLMicroFBRuleReasoner><http://jena.hpl.hp.com/2003/OWLMicroFBRuleReasoner>
> ] .
>
> <#tdbDataset> rdf:type tdb:DatasetTDB ;
> tdb:location "Data" .
> <#tdbGraph> rdf:type tdb:GraphTDB ;
> tdb:dataset <#tdbDataset> .
>
> # Dataset with full text index.
> <#dataset_fulltext> rdf:type text:TextDataset ;
> text:dataset <#dataset_inf> ;
> ##text:dataset <#tdbDataset> ;
> text:index <#indexLucene> .
>
> # Text index description
> <#indexLucene> a text:TextIndexLucene ;
> text:directory <file:Lucene><file:Lucene> ;
> ##text:directory "mem" ;
> text:entityMap <#entMap> ;
> .
>
> # Mapping in the index
> # URI stored in field "uri"
> # rdfs:label is mapped to field "text"
> <#entMap> a text:EntityMap ;
> text:entityField "uri" ;
> text:defaultField "text" ;
> text:map (
> [ text:field "text" ; text:predicate dc:title ]
> [ text:field "text" ; text:predicate dc:description ]
> ) .
>
>
> Any advice appreciated!
>
> Thanks,
> Stuart.
>
>
>
> The University of Aberdeen is a charity registered in Scotland, No
> SC013683.
>
The University of Aberdeen is a charity registered in Scotland, No SC013683.
