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From: Joachim K. <joa...@go...> - 2009-12-07 19:29:22
|
Hi Chowdary, Sorry for the late reply. Regarding your first question: there is currently no generated jar-file included. The project repository include two ant-build-files in order to build the project and also create the jar-files. Therefore use ant (ant.apache.org) and execute "ant build" on the command line. 2: The java-doc will be also created during the build process. There will be a folder "javadoc" including all necessary html-files. There are also examples included in the source code explaining how to use OWLDB. 3: OWLDB make use of the OWL-API (http://owlapi.sourceforge.net/) and represents a database-backend for this api. Thus you can use the querying and reasoning functionality of the owl-api in order to access your ontology stored via the owldb in your database. OWLDB uses an hibernate-mapping that allows to map the ontology represented by the owlapi in a database. Here we tried to optimise the mapping regarding the general requirements of owl. The resulting schema is very specific. Reusing projects with already existing database schemas and transfering their data to an ontology means to map the data between both worlds. That could be done either by a programm focused on database transformations or by a programm reading your existing database and transfering it to owlapi objects. Subsequently it would be automatically stored in a database based on the owldb functionality. As an alternative you can also use D2R2 (http://www4.wiwiss.fu-berlin.de/bizer/d2rq/) in order to map your existing db-schema to an ontology, dump it as rdf-ontology and use owldb as database-backend for this ontology. Best, Joachim > ------------------------------------------------------------------------ > Subject: > A question on OWLDB > From: > Chowdary DVRM <dvr...@gm...> > Date: > Fri, 4 Dec 2009 11:22:48 -0500 > To: > owl...@li... > > To: > owl...@li... > > Hi, > I am trying to use OWLDB in my project and I have a few questions > which I request you to help me with. > > 1. I don't see a jar file of the distribution in the svn. Where can I > find it ? > 2. Where can I find the javadoc for the api ? > 3. I would like to know how the ontology(TBox and ABox) stored in a > realational DB like MySQL can be queried and loaded into a reasoner > like Pellet using owldb(may be going through owldb's api doc might > help). In my project, the ontology schema and the existing database > schema are a little different(with many overlappings) and I would like > to query my database first to populate the ontology and load it into a > reasoner for inferencing and store the entailments back into the > database. So, basically, I guess I am trying to replicate what you > have done with OWLdB. It would be great if you can comment on such > situations where I don't want to stick to a database automatically > generated from an ontology schema which is what I guess owl db does. > > Thanks&Regards, > Chowdary Davuluri, > M.S. in CS&E, > The Ohio State University. |
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From: Joachim K. <joa...@go...> - 2010-01-02 15:28:38
|
---------- Forwarded message ----------
From: Chowdary DVRM <dvr...@gm...>
Date: 2009/12/17
Subject: Re: [Owldb-users] Owldb-users post from
dvr...@gm... approval
To: Joachim Kleb <joa...@go...>
Hi Jaochim,
I get the following error when I try using owldb.
-------------------------------------------------------------
INFO [main] (?:?) - Loading ontology: jdbc:mysql://localhost/owldb
INFO [main] (Environment.java:560) - Hibernate 3.3.2.GA
INFO [main] (Environment.java:593) - hibernate.properties not found
INFO [main] (Environment.java:771) - Bytecode provider name : javassist
INFO [main] (Environment.java:652) - using JDK 1.4 java.sql.Timestamp
handling
INFO [main] (Configuration.java:1474) - configuring from resource:
/hibernate.cfg.xml
INFO [main] (Configuration.java:1451) - Configuration resource:
/hibernate.cfg.xml
ERROR [main] (?:?) - Initial SessionFactory creation failed.
org.hibernate.HibernateException: /hibernate.cfg.xml not found
at
org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at
org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:1453)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1475)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1462)
at de.fraunhofer.iitb.owldb.util.HibernateCfgUtil.<init>(Unknown Source)
at de.fraunhofer.iitb.owldb.OWLDBOntology.<init>(Unknown Source)
at
de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown
Source)
at
de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown
Source)
at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.createOntology(Unknown
Source)
at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source)
at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source)
at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.saveOntology(Unknown
Source)
at ceti.osu.test.owldb.MyOwlDBTest.storeOntology(MyOwlDBTest.java:24)
at ceti.osu.test.owldb.MyOwlDBTest.main(MyOwlDBTest.java:36)
Exception in thread "main" java.lang.ExceptionInInitializerError
at de.fraunhofer.iitb.owldb.util.HibernateCfgUtil.<init>(Unknown Source)
at de.fraunhofer.iitb.owldb.OWLDBOntology.<init>(Unknown Source)
at
de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown
Source)
at
de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown
Source)
at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.createOntology(Unknown
Source)
at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source)
at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source)
at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.saveOntology(Unknown
Source)
at ceti.osu.test.owldb.MyOwlDBTest.storeOntology(MyOwlDBTest.java:24)
at ceti.osu.test.owldb.MyOwlDBTest.main(MyOwlDBTest.java:36)
Caused by: org.hibernate.HibernateException: /hibernate.cfg.xml not found
at
org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170)
at
org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:1453)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1475)
at org.hibernate.cfg.Configuration.configure(Configuration.java:1462)
... 10 more
----------------------------------------
I am not sure which hibernate.cfg.xml is being looked for. I tried creating
it in my project, but I still doesn't work.
Thanks,
Chowdary.
On Tue, Dec 8, 2009 at 12:59 AM, Joachim Kleb
<joa...@go...>wrote:
> Hi Chowdary,
>
> Sorry for the late reply. Regarding your first question: there is currently
> no generated jar-file
> included. The project repository include two ant-build-files in order to
> build the project and also create the jar-files.
> Therefore use ant (ant.apache.org) and execute "ant build" on the
> command line.
> 2: The java-doc will be also created during the build process. There
> will be a folder "javadoc" including all necessary html-files.
> There are also examples included in the source code explaining how to
> use OWLDB.
> 3: OWLDB make use of the OWL-API (http://owlapi.sourceforge.net/) and
> represents a database-backend for this api. Thus you can use the
> querying and reasoning functionality of the owl-api in order to access
> your ontology stored via the owldb in your database.
> OWLDB uses an hibernate-mapping that allows to map the ontology
> represented by the owlapi in a database. Here we tried to optimise the
> mapping regarding the general requirements of owl. The resulting schema
> is very specific. Reusing projects with already existing database
> schemas and transfering their data to an ontology means to map the data
> between both worlds. That could be done either by a programm focused on
> database transformations or by a programm reading your existing database
> and transfering it to owlapi objects. Subsequently it would be
> automatically stored in a database based on the owldb functionality.
>
> As an alternative you can also use D2R2
> (http://www4.wiwiss.fu-berlin.de/bizer/d2rq/) in order to map your
> existing db-schema to an ontology, dump it as rdf-ontology and use owldb
> as database-backend for this ontology.
>
> Best,
> Joachim
>
>
> ------------------------------
> Subject:
> A question on OWLDB
> From:
> Chowdary DVRM <dvr...@gm...> <dvr...@gm...>
> Date:
> Fri, 4 Dec 2009 11:22:48 -0500
> To:
> owl...@li...
> To:
> owl...@li... Hi,
> I am trying to use OWLDB in my project and I have a few questions which I
> request you to help me with.
>
> 1. I don't see a jar file of the distribution in the svn. Where can I find
> it ?
> 2. Where can I find the javadoc for the api ?
> 3. I would like to know how the ontology(TBox and ABox) stored in a
> realational DB like MySQL can be queried and loaded into a reasoner like
> Pellet using owldb(may be going through owldb's api doc might help). In my
> project, the ontology schema and the existing database schema are a little
> different(with many overlappings) and I would like to query my database
> first to populate the ontology and load it into a reasoner for inferencing
> and store the entailments back into the database. So, basically, I guess I
> am trying to replicate what you have done with OWLdB. It would be great if
> you can comment on such situations where I don't want to stick to a database
> automatically generated from an ontology schema which is what I guess owl db
> does.
>
> Thanks&Regards,
> Chowdary Davuluri,
> M.S. in CS&E,
> The Ohio State University.
>
>
>
> ------------------------------------------------------------------------------
> Join us December 9, 2009 for the Red Hat Virtual Experience,
> a free event focused on virtualization and cloud computing.
> Attend in-depth sessions from your desk. Your couch. Anywhere.
> http://p.sf.net/sfu/redhat-sfdev2dev
> _______________________________________________
> Owldb-users mailing list
>
> Owl...@li...
> https://lists.sourceforge.net/lists/listinfo/owldb-users
>
>
|
|
From: Joachim K. <joa...@go...> - 2010-01-02 15:28:58
|
---------- Forwarded message ---------- From: Joachim Kleb <joa...@go...> Date: 2010/1/2 Subject: Re: [Owldb-users] Owldb-users post from dvr...@gm... approval To: Chowdary DVRM <dvr...@gm...> Hi Chowdary, The "hibernate.cfg.xml"-file is not in included in the system path. Please add the file to the "path"-environment variable. Select the appropriate file included in the subfolders in the /config-folder. Means, use /config/MySql/hibernate.cfg.xml, if you are running a mysql-database. After that you should be able to run the program. Best, Joachim 2009/12/17 Chowdary DVRM <dvr...@gm...> Hi Jaochim, > I get the following error when I try using owldb. > ------------------------------------------------------------- > INFO [main] (?:?) - Loading ontology: jdbc:mysql://localhost/owldb > INFO [main] (Environment.java:560) - Hibernate 3.3.2.GA > INFO [main] (Environment.java:593) - hibernate.properties not found > INFO [main] (Environment.java:771) - Bytecode provider name : javassist > INFO [main] (Environment.java:652) - using JDK 1.4 java.sql.Timestamp > handling > INFO [main] (Configuration.java:1474) - configuring from resource: > /hibernate.cfg.xml > INFO [main] (Configuration.java:1451) - Configuration resource: > /hibernate.cfg.xml > ERROR [main] (?:?) - Initial SessionFactory creation failed. > org.hibernate.HibernateException: /hibernate.cfg.xml not found > at > org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170) > at > org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:1453) > at org.hibernate.cfg.Configuration.configure(Configuration.java:1475) > at org.hibernate.cfg.Configuration.configure(Configuration.java:1462) > at de.fraunhofer.iitb.owldb.util.HibernateCfgUtil.<init>(Unknown > Source) > at de.fraunhofer.iitb.owldb.OWLDBOntology.<init>(Unknown Source) > at > de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown > Source) > at > de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown > Source) > at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.createOntology(Unknown > Source) > at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source) > at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source) > at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.saveOntology(Unknown > Source) > at ceti.osu.test.owldb.MyOwlDBTest.storeOntology(MyOwlDBTest.java:24) > at ceti.osu.test.owldb.MyOwlDBTest.main(MyOwlDBTest.java:36) > Exception in thread "main" java.lang.ExceptionInInitializerError > at de.fraunhofer.iitb.owldb.util.HibernateCfgUtil.<init>(Unknown > Source) > at de.fraunhofer.iitb.owldb.OWLDBOntology.<init>(Unknown Source) > at > de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown > Source) > at > de.fraunhofer.iitb.owldb.OWLDBOntologyFactory.createOWLOntology(Unknown > Source) > at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.createOntology(Unknown > Source) > at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source) > at de.fraunhofer.iitb.owldb.OWLDBStorer.storeOntology(Unknown Source) > at de.fraunhofer.iitb.owldb.OWLDBOntologyManager.saveOntology(Unknown > Source) > at ceti.osu.test.owldb.MyOwlDBTest.storeOntology(MyOwlDBTest.java:24) > at ceti.osu.test.owldb.MyOwlDBTest.main(MyOwlDBTest.java:36) > Caused by: org.hibernate.HibernateException: /hibernate.cfg.xml not found > at > org.hibernate.util.ConfigHelper.getResourceAsStream(ConfigHelper.java:170) > at > org.hibernate.cfg.Configuration.getConfigurationInputStream(Configuration.java:1453) > at org.hibernate.cfg.Configuration.configure(Configuration.java:1475) > at org.hibernate.cfg.Configuration.configure(Configuration.java:1462) > ... 10 more > ---------------------------------------- > I am not sure which hibernate.cfg.xml is being looked for. I tried creating > it in my project, but I still doesn't work. > > Thanks, > Chowdary. > > On Tue, Dec 8, 2009 at 12:59 AM, Joachim Kleb <joa...@go... > > wrote: > >> Hi Chowdary, >> >> Sorry for the late reply. Regarding your first question: there is >> currently no generated jar-file >> included. The project repository include two ant-build-files in order to >> build the project and also create the jar-files. >> Therefore use ant (ant.apache.org) and execute "ant build" on the >> command line. >> 2: The java-doc will be also created during the build process. There >> will be a folder "javadoc" including all necessary html-files. >> There are also examples included in the source code explaining how to >> use OWLDB. >> 3: OWLDB make use of the OWL-API (http://owlapi.sourceforge.net/) and >> represents a database-backend for this api. Thus you can use the >> querying and reasoning functionality of the owl-api in order to access >> your ontology stored via the owldb in your database. >> OWLDB uses an hibernate-mapping that allows to map the ontology >> represented by the owlapi in a database. Here we tried to optimise the >> mapping regarding the general requirements of owl. The resulting schema >> is very specific. Reusing projects with already existing database >> schemas and transfering their data to an ontology means to map the data >> between both worlds. That could be done either by a programm focused on >> database transformations or by a programm reading your existing database >> and transfering it to owlapi objects. Subsequently it would be >> automatically stored in a database based on the owldb functionality. >> >> As an alternative you can also use D2R2 >> (http://www4.wiwiss.fu-berlin.de/bizer/d2rq/) in order to map your >> existing db-schema to an ontology, dump it as rdf-ontology and use owldb >> as database-backend for this ontology. >> >> Best, >> Joachim >> >> >> ------------------------------ >> Subject: >> A question on OWLDB >> From: >> Chowdary DVRM <dvr...@gm...> <dvr...@gm...> >> Date: >> Fri, 4 Dec 2009 11:22:48 -0500 >> To: >> owl...@li... >> To: >> owl...@li... Hi, >> I am trying to use OWLDB in my project and I have a few questions which I >> request you to help me with. >> >> 1. I don't see a jar file of the distribution in the svn. Where can I find >> it ? >> 2. Where can I find the javadoc for the api ? >> 3. I would like to know how the ontology(TBox and ABox) stored in a >> realational DB like MySQL can be queried and loaded into a reasoner like >> Pellet using owldb(may be going through owldb's api doc might help). In my >> project, the ontology schema and the existing database schema are a little >> different(with many overlappings) and I would like to query my database >> first to populate the ontology and load it into a reasoner for inferencing >> and store the entailments back into the database. So, basically, I guess I >> am trying to replicate what you have done with OWLdB. It would be great if >> you can comment on such situations where I don't want to stick to a database >> automatically generated from an ontology schema which is what I guess owl db >> does. >> >> Thanks&Regards, >> Chowdary Davuluri, >> M.S. in CS&E, >> The Ohio State University. >> >> >> >> ------------------------------------------------------------------------------ >> Join us December 9, 2009 for the Red Hat Virtual Experience, >> a free event focused on virtualization and cloud computing. >> Attend in-depth sessions from your desk. Your couch. Anywhere. >> http://p.sf.net/sfu/redhat-sfdev2dev >> _______________________________________________ >> Owldb-users mailing list >> >> Owl...@li... >> https://lists.sourceforge.net/lists/listinfo/owldb-users >> >> > |
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