Hi!
I'm evaluating Apache Marmotta for use as an LDP store for storing and
publishing bibliographic Linked Data at the National Library of Finland.
Our usage scenario is somewhat similar to that of DPLA. We would like to
store at least a million - possibly several million - small (50-100
triples) RDF documents, representing bibliographic metadata derived from
MARC records, in a triple store. Marmotta seems attractive because it
seems relatively simple (cf. Virtuoso which tries to do way too many
things in the same package!), supports LDP and SPARQL 1.1, and uses a
solid database (PostgreSQL) underneath.
I've done some initial tests using Marmotta 3.3.0 but I wanted to try
also the most recent development version since a 3.4.0 release seems to
be imminent. However, I have some problems building the development version.
Building the LDP module results in a test failure. Here is the output:
--snip--
Results :
Failed tests:
LdpWebServiceTest.testPUT:438 1 expectation failed.
Response body doesn't match expectation.
Expected: RDF/XML String (
to contain Statement(<http://localhost:9540/marmotta/ldp/x/PUT>
<http://www.w3.org/1999/02/22-rdf-syntax-ns#type>
<http://example.com/Example>) and
to contain Statement(<http://localhost:9540/marmotta/ldp/x/PUT>
<http://www.w3.org/2000/01/rdf-schema#label> null) and not
to contain Statement(<http://localhost:9540/marmotta/ldp/x/PUT>
<http://www.w3.org/ns/ldp#contains>
<http://localhost:9540/marmotta/ldp/x/PUT>))
Actual: <?xml version="1.0" encoding="UTF-8"?>
<rdf:RDF
xmlns:ldp="http://www.w3.org/ns/ldp#";
xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#";
xmlns:rdfs="http://www.w3.org/2000/01/rdf-schema#";
xmlns:xsd="http://www.w3.org/2001/XMLSchema#";
xmlns:dcterms="http://purl.org/dc/terms/";
xmlns:parent="http://localhost:9540/marmotta/ldp/x/";
xmlns:child="http://localhost:9540/marmotta/ldp/x/PUT/";
xmlns:this="http://localhost:9540/marmotta/ldp/x/PUT#";>
<rdf:Description rdf:about="http://localhost:9540/marmotta/ldp/x/PUT";>
<rdf:type rdf:resource="http://www.w3.org/ns/ldp#Resource"/>
<rdf:type rdf:resource="http://www.w3.org/ns/ldp#RDFSource"/>
<ldp:interactionModel
rdf:resource="http://www.w3.org/ns/ldp#Container"/>
<rdf:type rdf:resource="http://www.w3.org/ns/ldp#Container"/>
<rdf:type rdf:resource="http://www.w3.org/ns/ldp#BasicContainer"/>
<dcterms:created
rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime";>2016-09-22T10:37:18.585+03:00</dcterms:created>
<dcterms:modified
rdf:datatype="http://www.w3.org/2001/XMLSchema#dateTime";>2016-09-22T10:37:18.834+03:00</dcterms:modified>
</rdf:Description>
</rdf:RDF>
Tests run: 8, Failures: 1, Errors: 0, Skipped: 0
--snip--
In an attempt to build Marmotta despite the test failure, I tried adding
the -DskipTests=true parameter. However, this time the build fails at
the Linked Data Query CLI module. As far as I can tell, this is the only
relevant error message:
[WARNING] The POM for
com.fasterxml.jackson.jr:jackson-jr-objects:jar:2.3.5 is missing, no
dependency information available
Downloading:
https://repository.apache.org/content/repositories/releases/com/fasterxml/jackson/jr/jackson-jr-objects/2.3.5/jackson-jr-objects-2.3.5.jar
Here are my build commands:
(cleared ~/.m2 just to be sure)
git clone git://git.apache.org/marmotta.git
git checkout develop
mvn clean package
mvn clean package -DskipTests=true
My system is Ubuntu 16.04 amd64.
Here's the output of mvn --version:
Apache Maven 3.3.9
Maven home: /usr/share/maven
Java version: 1.8.0_91, vendor: Oracle Corporation
Java home: /usr/lib/jvm/java-8-openjdk-amd64/jre
Default locale: fi_FI, platform encoding: UTF-8
OS name: "linux", version: "4.4.0-36-generic", arch: "amd64", family: "unix"
Am I doing something wrong?
Thanks in advance,
Osma
--
Osma Suominen
D.Sc. (Tech), Information Systems Specialist
National Library of Finland
P.O. Box 26 (Kaikukatu 4)
00014 HELSINGIN YLIOPISTO
Tel. +358 50 3199529
osma.suomi...@helsinki.fi
http://www.nationallibrary.fi
