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RDF Data Cube
email list: publishing-statistical-data@googlegroups.com
W3C Candidacy: http://www.w3.org/TR/2013/CR-vocab-data-cube-20130625/
Data Documentation Initiative (DDI): http://events.linkeddata.org/ldow2013/papers/ldow2013-paper-12.pdf
LOD2 Webinar Series: CubeViz Michael Martin presents CubeViz - a facetted browser for statistical data utilizing the RDF Data Cube vocabulary which is the state-of-the-art in representing statistical data in RDF. This vocabulary is compatible with SDMX and increasingly being adopted. Based on the vocabulary and the encoded Data Cube, CubeViz is generating a facetted browsing widget that can be used to filter interactively observations to be visualized in charts. Based on the selected structure, CubeViz offer beneficiary chart types and options which can be selected by users.
If you are interested in Linked (Open) Data principles and mechanisms, LOD tools & services and concrete use cases that can be realised using LOD then join us in the free LOD2 webinar series!
A Dynamic Faceted Browser for Data Cube Statistical Data (pdf)
Sarven Capadisli:
I've worked on World Bank Linked Data [1] which uses the Data Cube vocabulary. The dataset is composed of World Development Indicators, World Bank Finances, World Bank Climate Change, World Bank Projects and Operations.
Also started on some preliminary visualizations at [2].
Data dumps are at [3]. See VoID file [4] if you need to automate or get more information about the datasets.
If you can share what you are up to publicly or off the list, I'd love to take a look.
[1] http://worldbank.270a.info/ [2] http://worldbank.270a.info/view [3] http://worldbank.270a.info/data/ [4] http://worldbank.270a.info/.well-known/void
We have been working on an OLAP query engine (olap4ld) over RDF data conforming to the RDF Data Cube vocabulary.
At 1 you find a link to the open-source code, and a demo + screencast of olap4ld in use.
There is still lots of work needed for the tool to be easily applied by other parties, I hope to find the time soon to make those changes to the code.
Best,
Benedikt
The W3C Government Linked Data Working Group has started work towards making Data Cube a W3C Recommendation. See here: http://www.w3.org/2011/gld/wiki/Data_Cube_Vocabulary
There's an Editor's Draft of the spec (content-wise so far identical to the old spec on Google Code): http://dvcs.w3.org/hg/gld/raw-file/default/data-cube/index.html
There's also a very rough first cut on a Use Cases and Requirements document: http://www.w3.org/2011/gld/wiki/Data_Cube_Vocabulary/Use_Cases
Dave and Richard, FZI's Benedikt Kämpgen and are working actively on this.
http://aksw.org/Projects/CSVImport.html representation of multi-dimensional statistical data as RDF using the RDF Data Cube vocabulary by importing spreadsheets into the OntoWiki plugin.
https://github.com/timrdf/csv2rdf4lod-automation/wiki/Example:-vivohack11 - we used data cube to expose coauthor SNA.
http://groups.google.com/group/publishing-statistical-data?hl=en_US Curran inquiry 14 dec 2011
http://publishing-statistical-data.googlecode.com/svn/trunk/specs/src/main/html/cube.html
http://opendatacommunities.org/datasets
http://wiki.planet-data.eu/web/Datasets
Environment Agency Bathing Water Quality data uses the cube vocabulary. For a starting set of links see: http://www.epimorphics.com/web/projects/bathing-water-quality
http://sns.linkedscotland.org/
ESDS International has recently completed a project where they looked at using the Data Cube Vocabulary to describe world back data, here’s the link to that data.
http://www.esds.ac.uk/international/access/LDaccess.asp
In [1], we have used QB with Mondrian and XML/A clients.
Momentarily, we are working on an OLAP4J implementation [2] to allow common OLAP clients to access QB data. So far, for visualization, we have been thinking of using Saiku [3], which connects to the OLAP4J API. As soon as I have a demo, I can post it here.
Regards,
Benedikt
[1] http://www.aifb.kit.edu/web/Inproceedings3211 [2] http://www.olap4j.org/ [3] http://analytical-labs.com/
"Tim weighed 10 kilograms on 8 Nov 2013"
tw:TimLebo pol:hasMeasurement <#measure_1> .
<#measure_1>
a pol:Measurement;
<http://sweet.jpl.nasa.gov/2.1/reprSciUnits.owl#hasUnit> unit:kilogram ;
pol:hasValue "10"^^xsd:decimal ;
pol:hasCharacteristic pol:Weight ; # for example... this doesn't exist in the pollution ontology.
time:inXSDDateTime "2013-11-08T20:05:00-0500"^^xsd:dateTime ;
.