Designing URI Sets for INSPIRE John Goodwin Senior Research Scientist (and Chair of UKLP Linked Data...

Designing URI Sets for INSPIRE

John Goodwin

Senior Research Scientist (and Chair of UKLP Linked Data Working Group)

30 May 2012

Linked Data

Linked Data:

• Use URIs to identify things.

• Use HTTP URIs so that these things can be referred to and looked up ("dereferenced") by people and user agents.

• Provide useful information about the thing when its URI is dereferenced, using standard formats such as RDF/XML.

• Include links to other, related URIs in the exposed data to improve discovery of other related information on the Web.

Identifying Things with URIs

• Use HTTP URIs to identify things, e.g. people, places, organisations

“John Goodwin”

http://www.johngoodwin.me.uk/me

“The City of Southampton”

http://data.ordnancesurvey.co.uk/id/7000000000037256

“Ordnance Survey”

http://reference.data.gov.uk/id/department/os

Making These URIs Dereferencable


http://data.ordnancesurvey.co.uk/doc/7000000000037256

http://data.ordnancesurvey.co.uk/doc/7000000000037256.rdf

Making These URIs Dereferencable

URI identifying the City of Southampton:http://data.ordnancesurvey.co.uk/id/7000000000037256

URI identifying the document describing the City of Southampton:http://data.ordnancesurvey.co.uk/doc/7000000000037256

URI identifying the HTML document describing the City of Southampton:

http://data.ordnancesurvey.co.uk/doc/7000000000037256.html

URI identifying the RDF document describing the City of Southampton:

http://data.ordnancesurvey.co.uk/doc/7000000000037256.rdf

INSPIRE

The EU INSPIRE Directive calls for

• “a common framework for the unique identification of spatial objects, to which identifiers under national systems can be mapped in order to ensure interoperability between them”

Spatial Things and Spatial Objects

Term Definition Source

Spatial Thing “Anything with spatial extent, i.e. size, shape, or position. e.g. people, places, bowling balls, as well as abstract areas like cubes.”

Spatial-Things are that subset of 'real-world phenomena' which relate to a location.

W3C “WGS84 Geo Positioning: an RDF

vocabulary”

Spatial Object An abstract representation of a real-world phenomenon related to a specific location or geographical area. This INSPIRE term is synonymous with the ISO 19100 term "(geographic) feature", and distinct from ISO "spatial object", which specifically contains the positional information for a feature.

INSPIRE Glossary item 67

Spatial Things and Spatial Objects

URI Sets

• “A collection of reference data published using URIs, about a single concept, governed from a single source.”

Identity

Term Definition Source

Unique Object Identifier Identifier associated with a spatial object

INSPIRE Glossary Item 77

Thematic Identifier Descriptive unique object identifier applied to spatial objects in a defined information theme

E.g. an administrative code for administrative area spatial objects in the administrative units theme, a parcel code for parcel spatial objects in a cadastral theme


Geographic Identifier spatial reference in the form of a label or code that identifies a location [ISO 19112] E.g. Postal codes: 53115, 01009, SW1, IV19 1PZ


Unique Object Identifiers

• namespace – intended as a unique identifier prefix to enable delegated administration of local identifier within a framework of globally unique identifiers.

• localId – a character string that is unique within a given namespace such that the combination of namespace name and localId form a globally unique spatial-object identifier (i.e. consistently identifies the same spatial-object).

• versionId – an optional component that is used to distinguish between multiple versions of a spatial object designated by a namespace/localId combination. A versionId is unique within the scope of a given namespace/localId combination ie. within the scope of a given namespace/localId, a versionId consistently designates a single version of the spatial-object that corresponds to the given namespace/localId.

URIs for Spatial Things

http://{your domain}/id/[{concept}]/{reference}

http://{sector}.data.gov.uk/id/{concept}/{reference} [/{version}]

http://location.data.gov.uk/id/{theme}/{concept} [/{codeset}]/{reference}[/{version}]

Examples of URIs for Spatial Things


http://environment.data.gov.uk/id/bathing-water/ukk2302-35600

http://transport.data.gov.uk/id/station/MAN

http://location.data.gov.uk/id/tn/station/crs/MAN

URIs for Spatial Objects

http://location.data.gov.uk/so/{theme}/{class}/ {namespace}/{localId}[/{versionId}]

http://{authority}/so/{theme}/{class}/{namespace}/ {localId}[/{versionId}]

Example of URIs for Spatial Object

http://location.data.gov.uk/so/ef/SamplingPoint/bwsp.eaew/35600

http://location.data.gov.uk/so/tn/RailwayStationNode/nwkr/123456

URIs for documents describing spatial things

http://{your domain}/doc/[{concept}]/{reference} [[.|/]{rendition}]

http://{sector}.data.gov.uk/doc/{concept}/{reference} [/{version}][[.|/]{rendition}]

http://location.data.gov.uk/doc/{theme}/{concept} [/{codeset}]/{reference}[/{version}] [[.|/]{rendition}]

URIs for document describing spatial objects

http://location.data.gov.uk/doc/{theme}/{class}/ {namespace}/{localId}[/{versionId}] [[.|/]{rendition}]

http://{authority}/doc/{theme}/{class}/{namespace}/ {localId}[/{versionId}][[.|/]{rendition}]

URIs for Classes and Properties

URIs for classes:

http://location.data.gov.uk/def/{theme}[/{package}] [/{concept|class}][/{version}]/{class}

URIs for Open Domain Properties:

http://location.data.gov.uk/def/{theme}[/{package}] [/{concept|class}][/{version}]/{property}

URIs for Closed Domain Properties:

http://location.data.gov.uk/def/{theme}[/{package}] [/{concept|class}][/{version}]/{class}/{property}

Acknowledgements

• Stuart Williams

Discussion

• Early days yet – so seeing how this works

• Does the ‘linked data way’ fit with the ‘INSPIRE way’ ?

Representing Geometry: GeoSPARQL

“The goal for the OGC GeoSPARQL standard is to support representing and querying geospatial data on the Semantic Web. GeoSPARQL defines a vocabulary for representing geospatial data in RDF, and it defines an extension to the SPARQL query language for processing geospatial data. “

Contact for further information

John Goodwin

[email protected]

Customer Service CentreOrdnance SurveyAdanac DriveSOUTHAMPTONUnited KingdomSO16 0AS

Phone: +44 (0)8456 05 05 05

Fax: +44 (0)8450 990494

[email protected]

www.ordnancesurvey.co.uk

Designing URI Sets for INSPIRE John Goodwin Senior Research Scientist (and Chair of UKLP Linked Data...

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