-Regards
Ajay
On Nov 4, 2015, at 9:28 PM, Kamble, Ajay, Crest
<[email protected]<mailto:[email protected]>> wrote:
Hi Andy,
Thanks for help. My server was able to access data after commenting
‘tdb:unionDefaultGraph’.
But the free text search that I tried did not work. I tried following query but
I got 0 results.
PREFIX text: <http://jena.apache.org/text#>
SELECT ?s
{
?s text:query 'gold' .
}
Is my configuration for text search correct. Also how do I specify 2 datasets
in single service?
Here is snippet from configuration:
# Text index description
<#indexLucene> a text:TextIndexLucene ;
text:directory <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 no:name ]
[ text:field "text" ; text:predicate no:alt-name ]
[ text:field "text" ; text:predicate no:name ]
[ text:field "text" ; text:predicate no:title ]
[ text:field "text" ; text:predicate no:author ]
[ text:field "text" ; text:predicate no:inventor ]
) .
[] rdf:type fuseki:Server ;
# Server-wide context parameters can be given here.
# For example, to set query timeouts: on a server-wide basis:
# 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 "10000" ] ;
# Load custom code (rarely needed)
# ja:loadClass "your.code.Class" ;
# Services available. Only explicitly listed services are configured.
# If there is a service description not linked from this list, it is
ignored.
fuseki:services (
<#service>
#<#service_text_tdb>
) .
<#service> rdf:type fuseki:Service ;
fuseki:name “mydb" ; # http://host:port/tdb
fuseki:serviceQuery "query" ; # SPARQL query service
fuseki:serviceQuery "sparql" ; # SPARQL query service
fuseki:serviceUpdate "update" ; # SPARQL query service
fuseki:serviceUpload "upload" ; # Non-SPARQL upload service
fuseki:serviceReadWriteGraphStore "data" ; # SPARQL Graph store
protocol (read and write)
fuseki:dataset <#dataset> ;
#fuseki:dataset :text_dataset ;
.
-Regards
Ajay
On Nov 4, 2015, at 7:54 PM, Andy Seaborne
<[email protected]<mailto:[email protected]><mailto:[email protected]>> wrote:
On 04/11/15 14:11, Kamble, Ajay, Crest wrote:
That worked for me. Also the option is —config and not —conf.
--config and --conf are synomys.
And it's "-" or "--" but not the en-dash or em-dash character your email is
putting in.
Fuseki starts but it does not read my existing data. If I execute simple query
to get count of triples, I get 0. Also, Fuseki gives this warning - Dataset not
found: No session.
Check the config file.
Try without "tdb:unionDefaultGraph true"
If I start Fuseki with —loc option and not —config, then it correctly reads all
data and the same query gives correct count.
--loc is shorthand for TDB only, no text dataset, no default union graph.
Is there anything wrong with the way I have configured dataset in assembler
file?
Also, do I need to create 2 different services for normal sprawl query and text
search?
If the query has no text:query, it executes like a plain SPARQL query on the
TDB datasets.
In other words, can I execute both types of queries in single console or not?
-Regards
Ajay
On Nov 4, 2015, at 7:35 PM, Andy Seaborne
<[email protected]<mailto:[email protected]><mailto:[email protected]>> wrote:
On 04/11/15 13:59, Kamble, Ajay, Crest wrote:
Hi Andy,
I tried that but it did not work. I got another error,
fuseki-server --update —conf=/tmp/fuseki-assembler.ttl /mydb
Required: either --config=FILE or one of --mem, --file, --loc or --desc
fuseki-server --conf=/tmp/fuseki-assembler.ttl
The service name is in teh assembler file - you can't give it again on the
command line.
Andy
-Regards
Ajay
On Nov 4, 2015, at 5:43 PM, Andy Seaborne
<[email protected]<mailto:[email protected]><mailto:[email protected]>> wrote:
Change "--desc" to "--conf"
"--desc" works in the restricted case when there is one dataset description -
but in this case there are two - the TDB dataset and the test dataset built over that.
Andy
On 04/11/15 12:10, Kamble, Ajay, Crest wrote:
Hi All,
1. Triplestore
I have an existing Triplestore that I setup by putting data in Fuseki. I used
Java code to put all triples in Fuseki (here is url that I used -
http://localhost:3030/mydb/data). Before starting loading of data I start
Fuseki with this command:
fuseki-server --update --loc=/tmp/fuseki-tdb /mydb
(on Mac OS X).
My database is located at /tmp/fuseki-tdb
This setup works well and I can query all triples from console.
2. Free Text Search
I need to setup free text search on top of this Triplestore, so that normal
Sparql queries and free text queries are both possible.
Here is the assembler file that I used.
@prefix : <http://mydb.com/ns/dataset#> .
@prefix rdf: <http://www.w3.org/1999/02/22-rdf-syntax-ns#> .
@prefix rdfs: <http://www.w3.org/2000/01/rdf-schema#> .
@prefix tdb: <http://jena.hpl.hp.com/2008/tdb#> .
@prefix ja: <http://jena.hpl.hp.com/2005/11/Assembler#> .
@prefix text: <http://jena.apache.org/text#> .
@prefix fuseki: <http://jena.apache.org/fuseki#> .
@prefix no: <http://mydb.com/ns/concepts#> .
@prefix d: <http://mydb.com/ns/data#> .
## Example of a TDB dataset and text index
## Initialize TDB
[] ja:loadClass "com.hp.hpl.jena.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 .
# Solr index
text:TextIndexSolr rdfs:subClassOf text:TextIndex .
## ---------------------------------------------------------------
## This URI must be fixed - it's used to assemble the text dataset.
:text_dataset rdf:type text:TextDataset ;
text:dataset <#dataset> ;
text:index <#indexLucene> ;
. I was trying to evaluate Jena+Fuseki for a project. The number of
triples that I put in Fuseki is 3161033. Our queries are of search type, for
example, given a search term/phrase get count of results, first 20 results and
some facets. All queries took between 3-10 seconds to execute, which was
disappointing.
# A TDB datset used for RDF storage
<#dataset> rdf:type tdb:DatasetTDB ;
tdb:location “/tmp/fuseki-tdb" ;
tdb:unionDefaultGraph true ; # Optional
.
# Text index description
<#indexLucene> a text:TextIndexLucene ;
text:directory <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 no:name ]
[ text:field "text" ; text:predicate no:alt-name ]
[ text:field "text" ; text:predicate no:name ]
[ text:field "text" ; text:predicate no:title ]
[ text:field "text" ; text:predicate no:author ]
[ text:field "text" ; text:predicate no:inventor ]
) .
[] rdf:type fuseki:Server I was trying to evaluate Jena+Fuseki for a
project. The number of triples that I put in Fuseki is 3161033. Our queries are
of search type, for example, given a search term/phrase get count of results,
first 20 results and some facets. All queries took between 3-10 seconds to
execute, which was disappointing. ;
# Server-wide context parameters can be given here.
# For example, to set query timeouts: on a server-wide basis:
# 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 "10000" ] ;
# Load custom code (rarely needed)
# ja:loadClass "your.code.Class" ;
# Services available. Only explicitly listed services are configured.
# If there is a service description not linked from this list, it is
ignored.
fuseki:services (
<#service>
#<#service_text_tdb>
) .
<#service> rdf:type fuseki:Service ;
fuseki:name “mydb" ; # http://host:port/tdb
fuseki:serviceQuery "query" ; # SPARQL query service
fuseki:serviceQuery "sparql" ; # SPARQL query service
fuseki:serviceUpdate "update" ; # SPARQL query service
fuseki:serviceUpload "upload" ; # Non-SPARQL upload service
fuseki:serviceReadWriteGraphStore "data" ; # SPARQL Graph store
protocol (read and write)
fuseki:dataset <#dataset> ;
fuseki:dataset :text_dataset ;
.
With this assembler file, I start my server with following command,
fuseki-server --update
--desc=/Users/kamb16/projects/nano/data/fuseki-assembler.ttl /mydb
I get following error,
com.hp.hpl.jena.sparql.ARQException: Found two matches: var ?root ->
http://mydb.com/ns/dataset#text_dataset, file:///tmp/fuseki-assembler.ttl#dataset
at com.hp.hpl.jena.sparql.util.QueryExecUtils.getOne(QueryExecUtils.java:360)
at
com.hp.hpl.jena.sparql.util.graph.GraphUtils.findRootByType(GraphUtils.java:194)
at
com.hp.hpl.jena.sparql.core.assembler.AssemblerUtils.build(AssemblerUtils.java:91)
at arq.cmdline.ModAssembler.create(ModAssembler.java:68)
at arq.cmdline.ModDatasetAssembler.createDataset(ModDatasetAssembler.java:43)
at org.apache.jena.fuseki.FusekiCmd.processModulesAndArgs(FusekiCmd.java:307)
at arq.cmdline.CmdArgModule.process(CmdArgModule.java:50)
at arq.cmdline.CmdMain.mainMethod(CmdMain.java:101)
at arq.cmdline.CmdMain.mainRun(CmdMain.java:63)
at arq.cmdline.CmdMain.mainRun(CmdMain.java:50)
at org.apache.jena.fuseki.FusekiCmd.main(FusekiCmd.java:166)
I do not understand how to fix this issue. Could you please help? I want to do
regular Sparql queries as well as Free text search.
Regards,
Ajay
