We released version 2.000 of Karma with many changes, new GUI, new RDF generator and many bug fixes.
Important note: we had a mishap in the repository, so if you have a clone from a previous version you cannot update it to the new version. You need to delete your existing clone and get a fresh clone from the repo.
Remember save your preloaded-ontologies and copy them back to the new clone.
We moved the semantic types to the menus in the columns. They are not in the little red and black circles.
Karma needs Java 1.7, Maven 3.0. Download Java SE from http://www.oracle.com/technetwork/java/javase/downloads/index.html
The Karma user guide is in the wiki.
Karma is an information integration tool that enables users to quickly and easily integrate data from a variety of data sources including databases, spreadsheets, delimited text files, XML, JSON, KML and Web APIs. Users integrate information by modeling it according to an ontology of their choice using a graphical user interface that automates much of the process. Karma learns to recognize the mapping of data to ontology classes and then uses the ontology to propose a model that ties together these classes. Users then interact with the system to adjust the automatically generated model. During this process, users can transform the data as needed to normalize data expressed in different formats and to restructure it. Once the model is complete, users can published the integrated data as RDF or store it in a database.
You can find useful tutorials on the project Website: http://www.isi.edu/integration/karma/
System Requirements: Java 1.7, Maven 3.0 and above.
To run the jetty server, execute the following command from webkarma top directory:
mvn jetty:run. Once the server has started point your browser to http://localhost:8080/web-karma.html. To start it on a port other than 8080 (e.g. Port number 9999)
mvn -Djetty.port=9999 jetty:run
To start in logging mode (where all the logs are stored in the log folder), use the following command to start the server:
mvn -Dslf4j=false -Dlog4j.configuration=file:./config/log4j.properties jetty:run
- Model your source and publish it's model (the published models are located at
src/main/webapp/publish/R2RML/inside the Karma directory). - To generate RDF of a CSV/JSON/XML file, go to the top level Karma directory and run the following command from terminal:
mvn exec:java -Dexec.mainClass="edu.isi.karma.rdf.OfflineRdfGenerator" -Dexec.args="--sourcetype
<sourcetype> --filepath <filepath> --modelfilepath <modelfilepath> --outputfile <outputfile>" -Dexec.classpathScope=compile
Valid argument values for sourcetype are: CSV, JSON, XML. Also, you need to escape the double quotes that go inside argument values. Example invocation for a JSON file:
mvn exec:java -Dexec.mainClass="edu.isi.karma.rdf.OfflineRdfGenerator" -Dexec.args="
--sourcetype JSON
--filepath \"/Users/shubhamgupta/Documents/wikipedia.json\"
--modelfilepath \"/Users/shubhamgupta/Documents/model-wikipedia.n3\"
--outputfile wikipedia-rdf.n3" -Dexec.classpathScope=compile
- To generate RDF of a database table, go to the top level Karma directory and run the following command from terminal:
mvn exec:java -Dexec.mainClass="edu.isi.karma.rdf.OfflineRdfGenerator" -Dexec.args="--sourcetype DB
--modelfilepath <modelfilepath> --outputfile <outputfile> --dbtype <dbtype> --hostname <hostname>
--username <username> --password <password> --portnumber <portnumber> --dbname <dbname> --tablename <tablename>" -Dexec.classpathScope=compile
Valid argument values for `dbtype` are Oracle, MySQL, SQLServer, PostGIS, Sybase. Example invocation:
mvn exec:java -Dexec.mainClass="edu.isi.karma.rdf.OfflineRdfGenerator" -Dexec.args="
--sourcetype DB --dbtype SQLServer
--hostname example.com --username root --password secret
--portnumber 1433 --dbname Employees --tablename Person
--modelfilepath \"/Users/shubhamgupta/Documents/db-r2rml-model.ttl\"
--outputfile db-rdf.n3" -Dexec.classpathScope=compile
You can do mvn exec:java -Dexec.mainClass="edu.isi.karma.rdf.OfflineRdfGenerator" -Dexec.args="--help" to get information about required arguments.
- in /src/main/config/jettyrealm.properties change user/password (if you wish)
- in /src/main/webapp/WEB-INF/web.xml uncomment security section at the end of the file
- in pom.xml uncomment security section (search for loginServices)
Yes. Due to Oracles binary license issues, we can't distribute the JAR file that is required for importing data from an Oracle database. Following are the steps to resolve the runtime error that you will get if you try to do it with the current source code:
- Download the appropriate JDBC drive JAR file (for JDK 1.5 and above) that matches your Oracle DB version. Link: http://www.oracle.com/technetwork/database/features/jdbc/index-091264.html
- Put the downloaded JAR file inside
libfolder of the Karma source code. - Add the following snippet in the
pom.xmlfile (present inside the top level folder of Karma source code) inside the dependencies XML element:
<dependency>
<groupId>com.oracle</groupId>
<artifactId>ojdbc</artifactId>
<version>14</version>
<scope>system</scope>
<systemPath>${project.basedir}/lib/ojdbc14.jar</systemPath>
</dependency>
Make sure that the filename mentioned in the systemPath element matches with your downloaded JAR file.