Linked Data

Government data in RDF

US-COMMUNITY(2005-2007)

CASTNET(1990 – Present)

RECS(2005)

GOV-BUDGET(1962-2014)

TOXIC-RELEASE(2005-2008)

EARTHQUAKE(Present)

STATE-LIB(2005-2007)PUBLIC-LIB

(1992-2006)

MED-COST(1994-2009)

LABOR-STAT(19xx-Present)

DATA-GOV-CATALOG(present)

US agency US location

GeoNames

CASTNET sites

ITSpending(2008-2010)

Community

Public Services

Environment

LODCloud

Government

Data-gov Wiki:Towards Linked Government DataLi Ding1, Dominic DiFranzo1, Sarah Magidson2, Deborah L. McGuinness1, Jim Hendler1

1Tetherless World Constellation, Rensselaer Polytechnic Institute, 110 8th St, Troy, NY 12180, USA2University of Chicago, 5801 South Ellis Avenue, Chicago, IL 60637, USA{dingl,difrad,dlm,hendler}@cs.rpi.edu magidson@uchicago.edu

… http://data-gov.tw.rpi.eduAcknowledgements: 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.

1. link similar datasets by reusing property namespace2. link to rdfs:label (via rdfs:subPropertyOf) using semantic wiki3. link to DBpedia (via owl:sameAs) using wikipedia widget 4. link instances (via common <property, literal-value> pair)5. link government data with web data (via time and location)6. link revisions of government data (via knowledge provenance)

A. render SPARQL results by Exhibit, Google Visualization,… B. integrate Web users’ collectively contributed dataC. inform Web users changes of dataset via RSS and Twitter

Linking Government Data

Using Linked Government Data

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 1

6

4

5

A

A2

A

AA

A B

CC

need manual disambiguation!

Map to Wikipedia/DBpedia Name

3B

ABC

1

normalize to RDF with dereferenceable URIpreserve data as literals with minimal parsing

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