Audun,
That needs investigating. It looks like it might be connected Eric's
report "fuseki update not persisting between sessions" as this erroneous
behaviour is characteristic of unflushed caches.
Could you tell me what
fuseki-server --version
reports? It tells me exactly which development version you are running
> I suspect it is of some significance that this does not (at least not so
> far) happen if I load an xml/rdf or .ttl file. However, as I am
> outputting RDF from XSLT I'd like to use N-Triples. Help is greatly
> appreciated.
The format isn't going to make any difference. Updates are handled by
the same code path regardless of format.
Andy
On 14/01/12 17:43, Audun Stolpe wrote:
Dear all,
Testing the 0.2.1. snapshot of the Fuseki distribution from the apache
respository, I ran into the following curious problem:
I have an N-triples file nace-sample.nt which looks like this:
<http://sws.ifi.uio.no/nace/SN2007/01>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://www.w3.org/2002/07/owl#Class> .
<http://sws.ifi.uio.no/nace/SN2007/01>
<http://www.w3.org/2000/01/rdf-schema#label>"Jordbruk og tjenester
tilknyttet jordbruk, jakt og viltstell"@nb.
<http://sws.ifi.uio.no/nace/SN2007/01>
<http://www.w3.org/2000/01/rdf-schema#comment>"SN2007 Næringskode: 01"@nb.
<http://sws.ifi.uio.no/nace/SN2007/01> <http://purl.org/dc/terms/title>
"Jordbruk og tjenester tilknyttet jordbruk, jakt og viltstell"@nb.
<http://sws.ifi.uio.no/nace/SN2007/01><http://sws.ifi.uio.no/vocab/nace/SN2007#nace>
"01"^^<http://www.w3.org/2001/XMLSchema#String>.
<http://sws.ifi.uio.no/nace/SN2007/01><http://sws.ifi.uio.no/vocab/nace/SN2007#level_id>
"2"^^<http://www.w3.org/2001/XMLSchema#int>.
<http://sws.ifi.uio.no/nace/SN2007/01><http://sws.ifi.uio.no/vocab/nace/SN2007#short_title>
"Jordbruk, tilhør. tjenester, jakt"@nb.
<http://sws.ifi.uio.no/nace/SN2007/01><http://sws.ifi.uio.no/vocab/nace/SN2007#medium_title>
"Jordbruk og tjenester tilknyttet jordbruk, jakt og viltstell"@nb.
<http://sws.ifi.uio.no/nace/SN2007/01.1>
<http://www.w3.org/2000/01/rdf-schema#subClassOf>
<http://sws.ifi.uio.no/nace/SN2007/01>.
<http://sws.ifi.uio.no/nace/SN2007/01.11>
<http://www.w3.org/2000/01/rdf-schema#subClassOf>
<http://sws.ifi.uio.no/nace/SN2007/01>.
<http://sws.ifi.uio.no/nace/SN2007/01.110>
<http://www.w3.org/2000/01/rdf-schema#subClassOf>
<http://sws.ifi.uio.no/nace/SN2007/01>.
<http://sws.ifi.uio.no/nace/SN2007/01.12>
<http://www.w3.org/2000/01/rdf-schema#subClassOf>
<http://sws.ifi.uio.no/nace/SN2007/01>.
<http://sws.ifi.uio.no/nace/SN2007/01.120>
<http://www.w3.org/2000/01/rdf-schema#subClassOf>
<http://sws.ifi.uio.no/nace/SN2007/01>.
<http://sws.ifi.uio.no/nace/SN2007/01.13>
<http://www.w3.org/2000/01/rdf-schema#subClassOf>
<http://sws.ifi.uio.no/nace/SN2007/01>.
<http://sws.ifi.uio.no/nace/SN2007/01.130>
<http://www.w3.org/2000/01/rdf-schema#subClassOf>
<http://sws.ifi.uio.no/nace/SN2007/01>.
I validated this file with RIOT, so it should be ok. Since I want to
persist data in TDB I do:
mkdir DB
followed by
./fuseki-server --update --loc=DB /dataset
and
./s-put http://localhost:3030/dataset/data default nace-sample.n3
The server returns a 204 No Content, so again everything should be fine.
Indeed using the Web-gui that ships with fuseki
'SELECT * WHERE {?s ?p ?o}' returns the table
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
| s | p | o |
===========================================================================================================================================================================
| <http://sws.ifi.uio.no/nace/SN2007/01.13> |
<http://www.w3.org/2000/01/rdf-schema#subClassOf> |
<http://sws.ifi.uio.no/nace/SN2007/01> |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://sws.ifi.uio.no/vocab/nace/SN2007#medium_title> | "Jordbruk og
tjenester tilknyttet jordbruk, jakt og viltstell"@nb |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://sws.ifi.uio.no/vocab/nace/SN2007#short_title> | "Jordbruk,
tilhør. tjenester, jakt"@nb |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://sws.ifi.uio.no/vocab/nace/SN2007#level_id> | 2 |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://sws.ifi.uio.no/vocab/nace/SN2007#nace> |
"01"^^<http://www.w3.org/2001/XMLSchema#String> |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://purl.org/dc/terms/title> | "Jordbruk og tjenester tilknyttet
jordbruk, jakt og viltstell"@nb |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://www.w3.org/2000/01/rdf-schema#comment> | "SN2007 Næringskode:
01"@nb |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://www.w3.org/2000/01/rdf-schema#label> | "Jordbruk og tjenester
tilknyttet jordbruk, jakt og viltstell"@nb |
| <http://sws.ifi.uio.no/nace/SN2007/01> |
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type> |
<http://www.w3.org/2002/07/owl#Class> |
| <http://sws.ifi.uio.no/nace/SN2007/01.1> |
<http://www.w3.org/2000/01/rdf-schema#subClassOf> |
<http://sws.ifi.uio.no/nace/SN2007/01> |
| <http://sws.ifi.uio.no/nace/SN2007/01.120> |
<http://www.w3.org/2000/01/rdf-schema#subClassOf> |
<http://sws.ifi.uio.no/nace/SN2007/01> |
| <http://sws.ifi.uio.no/nace/SN2007/01.11> |
<http://www.w3.org/2000/01/rdf-schema#subClassOf> |
<http://sws.ifi.uio.no/nace/SN2007/01> |
| <http://sws.ifi.uio.no/nace/SN2007/01.110> |
<http://www.w3.org/2000/01/rdf-schema#subClassOf> |
<http://sws.ifi.uio.no/nace/SN2007/01> |
| <http://sws.ifi.uio.no/nace/SN2007/01.12> |
<http://www.w3.org/2000/01/rdf-schema#subClassOf> |
<http://sws.ifi.uio.no/nace/SN2007/01> |
| <http://sws.ifi.uio.no/nace/SN2007/01.130> |
<http://www.w3.org/2000/01/rdf-schema#subClassOf> |
<http://sws.ifi.uio.no/nace/SN2007/01> |
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------
Now, if I first shut down fuseki and then do:
./fuseki-server --desc=tdb.ttl /dataset
where tdb.ttl is the config file that ships with the distro, then I
would expect the data to still be accessible over the same URL.
Nevertheless, this time the very same query returns
-------------
| s | p | o |
=============
| | | |
| | | |
| | | |
| | | 2 |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
| | | |
-------------
.. so the TDB instance is corrupt it seems.
I suspect it is of some significance that this does not (at least not so
far) happen if I load an xml/rdf or .ttl file. However, as I am
outputting RDF from XSLT I'd like to use N-Triples. Help is greatly
appreciated.
Best,
Audun Stolpe
