Reusing LOD Vocabularies: It's not all it's cracked up to be.


"Re-use data, re-use vocabularies", this has been the battle cry for Linked Open Data and Semantic Web enthusiasts since day one. Formally, the W3C Government Linked Data Working Group has published a Working Group Note on the matter where they state that "Standardized vocabularies should be reused as much as possible to facilitate inclusion and expansion of the Web of data". What seems to be a reasonable point of vue has been pushed a little bit too strongly of late.

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The 100 year old April Fool's joke


Perhaps you think you're funny?

I'd like to see you pull a prank that still causes problems 100 years after the fact.

Take a look at this group of soldiers from the CEF. They pulled a prank on their enlistment officer about their date of birth. A good one.

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Military Ontology Available


File Army-officer-icon.png from Wikimedia by RionThe Muninn Military and Organization ontologies have been released in OWL format on the Muninn RDF server and comments are welcome. These provide ontological terms for the markup of information about historical data and they provide more depth in terms of supporting changes to and the lineage of entities.

One of the ongoing problems with RDF markup and ontologies is that most of them are meant to support the expression of facts about the world as it currently is and not as it was or will be. This can create some issues in that most data is meant to be true at only one point in time.

The ontology includes support for military ranks, roles, organization types and service-specific chains of commands. Limited NATO rank equivalencies are provided and the country specific rank instances are being worked on. Any comments and suggestions are welcome.


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Graves Ontology Available


Grave of an Unknown SoldierA new OWL ontology has been released for the RDF markup of graves, human remains and commemorative monuments. It supports complex relationships between the remains, the grave and the different markers in use; recording the movement of remains is also possible as well as the linkage to the identity of the deceased.

The documentation is available here and the ontology in OWL format here. While the ontology is meant to support Muninn's data, it can be used on a stand alone basis for other projects.

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SPARQL and Linked Open Data


After a few hiccups with the SPARQL database and the web front end, the Muninn website will be undergoing some major re-work. I'll update this blog post as the new interface features go online. Update: Feb 23, 2012 - The SPARQL server at is answering queries.

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