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Linked Data

Linked Data

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Linked Data

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  1. Data-gov Wiki: Towards Linked Government Data Tetherless World DATA-GOV Map to Wikipedia/DBpedia Name Li Ding1, Dominic DiFranzo1, Sarah Magidson2, Deborah L. McGuinness1, Jim Hendler1 1Tetherless World Constellation, Rensselaer Polytechnic Institute, 110 8th St, Troy, NY 12180, USA 2University of Chicago, 5801 South Ellis Avenue, Chicago, IL 60637, USA {dingl,difrad,dlm,hendler}@cs.rpi.edu magidson@uchicago.edu need manual disambiguation! • semantic web enabled portal for linked government data • 5 billion triples from data.gov • hosts apps, demos & services • integrates users’ contributions About Data-gov Wiki B 3 • … A B 1 5 DATA GOV GeoNames LOD Cloud A US location US agency A Environment Community GOV-BUDGET (1962-2014) EARTHQUAKE (Present) RECS (2005) ITSpending (2008-2010) Government TOXIC-RELEASE (2005-2008) LABOR-STAT (19xx-Present) DATA-GOV-CATALOG (present) CASTNET (1990 – Present) US-COMMUNITY (2005-2007) A Public Services CASTNET sites MED-COST (1994-2009) STATE-LIB (2005-2007) PUBLIC-LIB (1992-2006) A 4 C 2 A C 6 Using Linked Government Data render SPARQL results by Exhibit, Google Visualization,… integrate Web users’ collectively contributed data inform Web users changes of dataset via RSS and Twitter Linked Data A B Government data in RDF C Linking Government Data link similar datasets by reusing property namespace link to rdfs:label (via rdfs:subPropertyOf) using semantic wiki link to DBpedia (via owl:sameAs) using wikipedia widget link instances (via common <property, literal-value> pair) link government data with web data (via time and location) link revisions of government data (via knowledge provenance) 1 2 3 • normalize to RDF with dereferenceable URI • preserve data as literals with minimal parsing 4 5 6 http://data-gov.tw.rpi.edu Acknowledgements: This work is partially supported by NSF Award #0524481,IARPA Award #FA8750-07-2-0031, and DARPA award #FA8750-07-D-0185, #55-002001, #FA8650-06-C-7605.