government linked data uri design
DESCRIPTION
TRANSCRIPT
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Government URI Designfor Linked Data
W3C Government Linked Data Working Group First F2FJune 29-30, 2011
David [email protected]
Tuesday, June 28, 2011
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LOGD Instance HubURI Design
•http://logd.tw.rpi.edu/instance-hub-uri-design
•Presented by me because RPI representatives could not attend this meeting.
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URI Design Goals
•URIs should be:•easily re-hostable.•Concise•Able to span many domains, e.g.•National identifiers (e.g. agencies, states)•State-level identifiers (e.g. counties, congressional districts)•Agency-level identifiers (e.g. EPA facilities)
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URI Design Overview
•URI Template:
http://' BASE '/' 'id' '/' ORG '/' CATEGORY ('/' TOKEN)+
•RPI TWC’s LOGD project uses a BASE of:'logd.tw.rpi.edu'•3 Round Stones uses a BASE of:‘<agency>.3roundstones.com’
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id
•Required to avoid “polluting” the top namespace.
•We want as short a token as possible.
•Also, consistency with data.gov.uk URIs here is a good thing.
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ORG
•a short token representing the agency, government, or organization that controls the identifier space.
•For USG, this token will be 'us/' plus a designation of either federal or state-level (e.g. 'us/fed', 'us/ny').
•For identifiers that aren't directly governmental, the ORG token should be suitably unique; e.g. "usps-com" for USPS controlled zip code URIs.
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CATEGORY and TOKEN
•These are ORG-specific values that identify the specific instance.
•Use as many TOKENs as necessary to distinguish the instance.
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Example: USG Agencies
•Owner: federal
•Suggested:http://BASE/id/us/fed/agency/NAME/SUBNAME
•Example:http://BASE/id/us/fed/agency/Commerce/National_Oceanic_and_Atmospheric_Administration
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Example: USG Agencies
•Example:
http://BASE/id/us/fed/agency/Commerce/NOAA
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States and Territories
•Owner: federal
•Suggested:http://BASE/id/us/state/NAME
•Example:http://logd.tw.rpi.edu/id/us/state/Vermont
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States and Territories
•States and territories are identified by FIPS 5-2 codes, two-letter abbreviations, and names.
•Not all states/territories have two-letter abbreviations.
•FIPS 5-2 has been withdrawn as a FIPS standard (2008). Names are probably the most stable.
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EPA Facilities
•Owner: EPA
•Suggested:http://BASE/id/epa-gov/facility/ID
•Example:http://BASE/id/epa-gov/facility/110007995027
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Persistent URLs
•PURLs may be used to hide when URIs change (ownership, hosting, control).
•Already in wide use by the Linked Open Data project (e.g. for vocabularies) and by the USG (US GPO, see http://purl.fdlp.gov).
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Persistent URLs
•Can also be used to shorten URIs and/or make them appear in conformance to a scheme, e.g.
http://purl.fdlp.gov/GPO/LPS105923redirects to:http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19870020802_1987020802.pdf
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THANK YOU
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Tuesday, June 28, 2011