On 11/11/2018 20:37, Laura Morales wrote:
FWIW I've copypasted this assembler file
https://jena.apache.org/documentation/tdb/assembler.html#mixed-datasets and
I've run this command
$ tdbquery --tdb mixed-datasets.ttl --query <( echo "select * where {?s ?p ?o} limit
1" )
and I still see the same error:
org.apache.jena.sparql.ARQException: No such type:
<http://jena.hpl.hp.com/2008/tdb#DatasetTDB>
tdb2:DatasetTDB2.
even if I remove the namedGraph.
Sent: Sunday, November 11, 2018 at 5:50 PM
From: ajs6f <[email protected]>
To: [email protected]
Subject: Re: DatasetTDB2 with separate namedGraphs
TDB2 is certainly younger, but that means both that it has capabilities that
TDB1 doesn't (like MR+SW) and that it lacks utilities and functions that TDB1
has. For example, the issue with compaction.
There is no need to load a TDB1 database from HTTP (unless you have other
constraints). Just use tdbloader or tdbloader2. tdbloader will work against an
extant TDB1 database.
TDB2 is a more-or-less independent code base from TDB1, not a new version of
the same codebase, so there is no reason to think that bugs in TDB1 are fixed
in TDB2. If anything TDB2 is newer and therefore not as battle-tested as TDB1,
so it is more likely to have bugs. TDB1 is not going anywhere anytime soon.
We certainly appreciate people using TDB2 and giving feedback to the project,
but if you have a problem with the lack of automated compaction and no specific
concrete reason to use TDB2, it might be better to use TDB1. YMMV.
ajs6f
On Nov 11, 2018, at 11:06 AM, Laura Morales <[email protected]> wrote:
To be completely honest, simply because TDB2 is advertised as "next generation"
storage for jena so I prefer to stick with the newer version and try to avoid any TDB
problems that are fixed in TDB2. Besides, some graphs are GBs in size so loading them via
tdb2.* utilities seems more appropriate to me than GB-size HTTP requests...
Sent: Sunday, November 11, 2018 at 4:49 PM
From: ajs6f <[email protected]>
To: [email protected]
Subject: Re: DatasetTDB2 with separate namedGraphs
Then let me ask a different question-- is there a reason in particular that you
are using TDB2? TDB1 doesn't have the monotonically-increasing size issue, and
you could use the well-defined and standardized SPARQL Graph Store protocol [1]
to insert and delete graphs.
ajs6f
[1] https://www.w3.org/TR/sparql11-http-rdf-update/
On Nov 11, 2018, at 10:42 AM, Laura Morales <[email protected]> wrote:
Is there some reason you don't just copy the graphs into one database?
Because I need to swap graphs frequently, for example delete Graph1 and insert
Graph2. If I put all of them into the same dataset I would have to manage the
database size or tdb2.tdbcompact it often since the database only increase in
size if I'm right. So, with separate databases, I can just delete the whole
folder and replace it with something else.
Sent: Sunday, November 11, 2018 at 4:32 PM
From: ajs6f <[email protected]>
To: [email protected]
Subject: Re: DatasetTDB2 with separate namedGraphs
Andy can comment further, but I'm not sure that's possible. Is there some
reason you don't just copy the graphs into one database?
In any event, what you have written down now as assembler RDF shows a
tdb2:GraphTDB2 being declared with a tdb2:location and no name. I don't think
that's correct. Here is an example that might be more on point:
https://github.com/apache/jena/blob/master/jena-db/jena-tdb2/testing/Assembler/tdb-named-graph-2.ttl[https://github.com/apache/jena/blob/master/jena-db/jena-tdb2/testing/Assembler/tdb-named-graph-2.ttl][https://github.com/apache/jena/blob/master/jena-db/jena-tdb2/testing/Assembler/tdb-named-graph-2.ttl[https://github.com/apache/jena/blob/master/jena-db/jena-tdb2/testing/Assembler/tdb-named-graph-2.ttl]]
ajs6f
On Nov 11, 2018, at 10:23 AM, Laura Morales <[email protected]> wrote:
More or less, yes.
I want 2 separate TDB2 databases, each one containing 1 graph. And I want a
dataset that is defined by using those graphs from the separate databases. So,
the dataset should have a graph called Graph1 located at ~/graph1 and another
graph called Graph2 located at ~/graph2.
Then I'd like to query it like this: SELECT * FROM Graph1...
Sent: Sunday, November 11, 2018 at 3:54 PM
From: ajs6f <[email protected]>
To: [email protected]
Subject: Re: DatasetTDB2 with separate namedGraphs
I'm not quite sure what you're trying to do here-- are you trying to extract
one named graph from one TDB2 database, another named graph from another TDB2
database, and present them via Fuseki as a single dataset?
ajs6f
On Nov 11, 2018, at 9:49 AM, Laura Morales <[email protected]> wrote:
Can somebody please help me with configuring an assembler file for DatasetTDB2
with multiple namedGraphs in separate files? I have this configuration but it
doesn't work
======================================================================
PREFIX fuseki:
<http://jena.apache.org/fuseki#[http://jena.apache.org/fuseki#][http://jena.apache.org/fuseki#[http://jena.apache.org/fuseki#]][http://jena.apache.org/fuseki#[http://jena.apache.org/fuseki#][http://jena.apache.org/fuseki#[http://jena.apache.org/fuseki#]]]>
PREFIX ja:
<http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#][http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#]][http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#][http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#]]][http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#][http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#]][http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#][http://jena.hpl.hp.com/2005/11/Assembler#[http://jena.hpl.hp.com/2005/11/Assembler#]]]]>
PREFIX rdf:
<http://www.w3.org/1999/02/22-rdf-syntax-ns#[http://www.w3.org/1999/02/22-rdf-syntax-ns#][http://www.w3.org/1999/02/22-rdf-syntax-ns#[http://www.w3.org/1999/02/22-rdf-syntax-ns#]][http://www.w3.org/1999/02/22-rdf-syntax-ns#[http://www.w3.org/1999/02/22-rdf-syntax-ns#][http://www.w3.org/1999/02/22-rdf-syntax-ns#[http://www.w3.org/1999/02/22-rdf-syntax-ns#]]][http://www.w3.org/1999/02/22-rdf-syntax-ns#[http://www.w3.org/1999/02/22-rdf-syntax-ns#][http://www.w3.org/1999/02/22-rdf-syntax-ns#[http://www.w3.org/1999/02/22-rdf-syntax-ns#]][http://www.w3.org/1999/02/22-rdf-syntax-ns#[http://www.w3.org/1999/02/22-rdf-syntax-ns#][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#][http://www.w3.org/2000/01/rdf-schema#[http://www.w3.org/2000/01/rdf-schema#]][http://www.w3.org/2000/01/rdf-schema#[http://www.w3.org/2000/01/rdf-schema#][http://www.w3.org/2000/01/rdf-schema#[http://www.w3.org/2000/01/rdf-schema#]]][http://www.w3.org/2000/01/rdf-schema#[http://www.w3.org/2000/01/rdf-schema#][http://www.w3.org/2000/01/rdf-schema#[http://www.w3.org/2000/01/rdf-schema#]][http://www.w3.org/2000/01/rdf-schema#[http://www.w3.org/2000/01/rdf-schema#][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#][http://jena.hpl.hp.com/2008/tdb#[http://jena.hpl.hp.com/2008/tdb#]][http://jena.hpl.hp.com/2008/tdb#[http://jena.hpl.hp.com/2008/tdb#][http://jena.hpl.hp.com/2008/tdb#[http://jena.hpl.hp.com/2008/tdb#]]][http://jena.hpl.hp.com/2008/tdb#[http://jena.hpl.hp.com/2008/tdb#][http://jena.hpl.hp.com/2008/tdb#[http://jena.hpl.hp.com/2008/tdb#]][http://jena.hpl.hp.com/2008/tdb#[http://jena.hpl.hp.com/2008/tdb#][http://jena.hpl.hp.com/2008/tdb#[http://jena.hpl.hp.com/2008/tdb#]]]]>
PREFIX tdb2:
<http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#][http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#]][http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#][http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#]]][http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#][http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#]][http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#][http://jena.apache.org/2016/tdb#[http://jena.apache.org/2016/tdb#]]]]>
PREFIX text:
<http://jena.apache.org/text#[http://jena.apache.org/text#][http://jena.apache.org/text#[http://jena.apache.org/text#]][http://jena.apache.org/text#[http://jena.apache.org/text#][http://jena.apache.org/text#[http://jena.apache.org/text#]]][http://jena.apache.org/text#[http://jena.apache.org/text#][http://jena.apache.org/text#[http://jena.apache.org/text#]][http://jena.apache.org/text#[http://jena.apache.org/text#][http://jena.apache.org/text#[http://jena.apache.org/text#]]]]>
:dataset a ja:RDFDataset .
:dataset ja:namedGraph
[
ja:graphName
<http://example.org/graph1[http://example.org/graph1][http://example.org/graph1[http://example.org/graph1]][http://example.org/graph1[http://example.org/graph1][http://example.org/graph1[http://example.org/graph1]]][http://example.org/graph1[http://example.org/graph1][http://example.org/graph1[http://example.org/graph1]][http://example.org/graph1[http://example.org/graph1][http://example.org/graph1[http://example.org/graph1]]]]>
;
ja:graph
[
a tdb2:GraphTDB2 ;
tdb2:location "/path/to/dataset1/" ;
]
] .
:dataset ja:namedGraph
[
ja:graphName
<http://example.org/graph2[http://example.org/graph2][http://example.org/graph2[http://example.org/graph2]][http://example.org/graph2[http://example.org/graph2][http://example.org/graph2[http://example.org/graph2]]][http://example.org/graph2[http://example.org/graph2][http://example.org/graph2[http://example.org/graph2]][http://example.org/graph2[http://example.org/graph2][http://example.org/graph2[http://example.org/graph2]]]]>
;
ja:graph
[
a tdb2:GraphTDB2 ;
tdb2:location "/path/to/dataset2/" ;
]
] .
======================================================================
I get this error when I try to query it:
org.apache.jena.sparql.ARQException: No such type:
<http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2][http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2]][http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2][http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2]]][http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2][http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2]][http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2][http://jena.apache.org/2016/tdb#DatasetTDB2[http://jena.apache.org/2016/tdb#DatasetTDB2]]]]>
at
org.apache.jena.sparql.core.assembler.AssemblerUtils.build(AssemblerUtils.java:122)
at tdb2.cmdline.ModTDBDataset.createDataset(ModTDBDataset.java:82)
at arq.cmdline.ModDataset.getDataset(ModDataset.java:36)
at arq.query.getDataset(query.java:176)
at arq.query.queryExec(query.java:213)
at arq.query.exec(query.java:153)
at jena.cmd.CmdMain.mainMethod(CmdMain.java:93)
at jena.cmd.CmdMain.mainRun(CmdMain.java:58)
at jena.cmd.CmdMain.mainRun(CmdMain.java:45)
at tdb2.tdbquery.main(tdbquery.java:30)
