Hi,
first let me briefly introduce myself: My name is Basil Ell and I am currently
working for my master thesis at AIFB Karlsruhe – supervised by Denny Vrandecic.
As a part of my work I created an extension to be used together with SMW that
let's you query freebase [1] using conventional askQL queries. Querying
freebase is easily achieved by simply adding the parameter source=freebase:
{{#ask: [[Category:City]] [[located in::Germany]]
| ?population
| source=freebase
}}
Or you can even query for cities and their population in 독일 (Dogil), the Korean
name of Germany:
{{#ask: [[Category:City]] [[located in::독일]]
| ?population
| source=freebase
| language=/lang/ko
}}
I strive in making data integration as easy as possible. The main idea is, that
the information necessary for mapping between askQL and MQL is separated from
the integration statement - the askQL query. Therefore this information is
stored on pages in main namespace, category namespace, and property namespace.
Users that are experienced with freebase can add mapping information to an SMW
and all users benefit from the increasing mapping possibilities.
For the example above the page Category:City stores that this category maps to
"/location/citytown", the page Property:located in stores that this property
maps to "/location/location/containedby" and the page Property:Population
stores that this print request maps to
"/location/statistical_region/population;number" and is of numerical type.
I set up a demo wiki [2] where you find documentation and examples, observe the
current state of my work in progress, and experience current possibilities and
limitations.
A blog [3] is available where I plan to report on further development and
releases.
I am looking forward to your opinions.
Best regards,
Basil
[1] http://www.freebase.com/
[2] http://basil-ell.de/mediawiki/mediawiki-1.15.0/index.php5?title=Main_Page
[3] http://www.basil-ell.de/data_integration/
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