LODStats

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Overview

One of the major obstacles for a wider usage of Web Data is the difficulty to obtain a clear picture of the available datasets. In order to reuse, link, revise or query a dataset published on the Web it is important to know the structure, coverage and coherence of the data.

LODStats is a statement-stream-based approach for gathering comprehensive statistics about datasets adhering to the Resource Description Framework (RDF). LODStats is based on the declarative description of statistical dataset characteristics. Its main advantages over other approaches are a smaller memory footprint and significantly better performance and scalability. We integrated LODStats into the CKAN dataset metadata registry and obtained a comprehensive picture of the current state of the Data Web.

Demo

A demo installation collecting statistics from all LOD datasets
registered on CKAN is available from:

http://stats.lod2.eu

Installation and Download

LODStats is available via PyPI (e.g. pip install lodstats) and GitHub (https://github.com/AKSW/LODStats).

Installation instructions (from PyPI):

$ sudo apt-get install python-librdf python-virtualenv gcc python-dev python-setuptools
$ virtualenv $HOME/lodstats-env
$ . $HOME/lodstats-env/bin/activate
(lodstats-env) $ pip install lodstats

Installation instructions (from source):

$ git clone

https://github.com/AKSW/LODStats
$ sudo apt-get install python-librdf python-virtualenv gcc python-dev python-setuptools
$ virtualenv $HOME/lodstats-env
$ . $HOME/lodstats-env/bin/activate
(lodstats-env) $ cd LODStats
(lodstats-env) $ python setup.py install

Using LODStats from the command-line:

$ . $HOME/lodstats-env/bin/activate (if not active already, watch for the altered prompt)
(lodstats-env) $ lodstats --help
Usage: lodstats [options] [-m model.{rdf,nt,...}] file/URI
[...]
(lodstats-env) $ lodstats -vp some_rdf_file.nt

Further Information

Jan Demter, Sören Auer, Michael Martin, Jens Lehmann: LODStats – An Extensible Framework for High-performance Dataset Analytics, submitted to ESWC2012

Contact

Jan Demter

Dr. Sören Auer

Johannisgasse 26, Zimmer 5-09
04103 Leipzig

Tel.:		+49 341 97-32367
E-Mail, Homepage, Research Group, rdfs:seeAlso

Michael Martin

Johannisgasse 26, Zimmer 5-20
04103 Leipzig

Tel.:		+49 341 97 32322
E-Mail, Workpage, Research Group, Homepage, Bookmarks, rdfs:seeAlso

Dr. Jens Lehmann

Johannisgasse 26, Zimmer 5-10
04103 Leipzig

Tel.:		+49 341 97-32260
E-Mail, Homepage, Research Group

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Last Modification: 2012-03-24 00:57:48 by Access denied Jan Demter