Extraction Instructions
- Java 7
- Maven2
$ git clone git://github.com/dbpedia/extraction-framework.git
or use this page for more detailed instructions
In the root directory run the following commands
$ mvn clean install # Compiles the code
$ cd dump
$ ../run download config=download-config-file # Downloads the wikipedia dumps
$ ../run extraction extraction-config-file # Extracts triples form the downloaded dumps
For download-config-file & extract-config-file you can either re-use existing files from the repository or adapt them to your needs.
Before running the existing config files, open the config file with a editor and modify according to your environment.
For fine-grained serialization options you can read this page.
Note: Besides the following instructions you can simply download the abstracts triples from the DBpedia dumps directory. For example, here you can find the abstracts files (long and sort versions) for the Spanish (es) chapter: http://downloads.dbpedia.org/3.9/es/
Abstracts are not generated by the Simple Wiki Parser, they are produced by a local wikipedia clone using a modified mediawiki installation.
In order to generate clean abstracts from Wikipedia articles one needs to render wiki templates as they would be rendered in the original Wikipedia instance. So in order for the DBpedia Abstract Extractor to work, a running Media Wiki instance with Wikipedia data in a MySQL database is necessary.
To install and start the MySQL server, you can use dump/src/main/bash/mysql.sh. Set MYSQL_HOME to the folder where you installed the MySQL binaries.
To import the data, you need to run the Scala 'import' launcher:
First you have to adapt the settings for the 'import' launcher in dump/pom.xml:
<arg>/home/release/wikipedia</arg><!-- path to folder containing Wikipedia XML dumps -->
<arg>/home/release/data/projects/mediawiki/core/maintenance/tables.sql</arg><!--file containing MediaWiki table definitions -->
<arg>localhost</arg><!-- MySQL host:port - localhost should work if you use mysql.sh -->
<arg>true</arg><!-- require-download-complete -->
<arg>10000-</arg><!-- languages and article count ranges, comma-separated, e.g. "en,de" -->
Then you need to cd to dump/ and call
../run import
This should import all the templates into the MySQL tables.
To set up the local Wikipedia instance you have to use the modified MediaWiki code from here: https://github.com/dbpedia/extraction-framework/tree/master/dump/src/main/mediawiki and configure it to listen to the URL from here
See http://wiki.dbpedia.org/AbstractExtraction for a few more details. TODO: move content from that page here.
See https://github.com/dbpedia/extraction-framework/wiki/Dbpedia-Abstract-Extraction-step-by-step-guide for Step by step approach.
To download a fresh copy of the DBpedia ontology from the mappings wiki, use the following commands
$ cd ../core
$ ../run download-ontology
You can download the mappings from http://mappings.dbpedia.org offline and use the local files for the extraction (configuration in extract.config file)
$ cd ../core
$ ../run download-mappings
Updates various settings for all Wikipedia language editions
$ cd ../core
$ ../run generate-settings
TODO
If you want to setup a new DBpedia Live instance use this page
TODO