INSPIRE 2013, Florence

Transcription

1 Joining up INSPIRE XML and Core Location RDF schemas to interconnect Belgian address data INSPIRE 2013, Florence 25 June 2013 Andrea Perego Michael Lutz Nikolaos Loutas Vassilios Peristeras I.T.

2 ISA undertakes initiatives to foster interoperability of information exchanges by public administrations across sectors and borders Action 1.1 Semantic Interoperability Action 1.17 Reusable INSPIRE reference components (ARE3NA) Action 2.13 EU Location Framework 2

3 1 Core Vocabularies for egovernment 1. Core Vocabularies for egovernment 2. Core Location Vocabulary 3. Designing URI sets for location 4. Core Location Pilot I.T.

4 Core vocabularies Simplified, re-usable, and extensible data models that capture the fundamental characteristics of a data entity in a context-neutral fashion. CORE PUBLIC SERVICE VOCABULARY 5

5 Why relevant? Interoperability of base registers: common vocabularies for interconnecting authentic sources of Government data 2. Basic data a Minimal Viable Product Interoperability of public services: greatest common denominator to which one can add context-specific extensions. 6

6 European Interoperability Framework Recommendation 12. Public administrations, when working to establish European public services, should develop interfaces to authentic sources and align them at semantic and technical level. 7

7 Denmark: Good basic data for everyone 8

8 2 The Core Location Vocabulary 1. Core Vocabularies for egovernment 2. Core Location Vocabulary 3. Designing URI sets for location 4. Core Location Pilot I.T.

9 Core Location Vocabulary A simplified, reusable and extensible data model that captures the fundamental characteristics of a location, represented as an address, a geographic name, or a geometry. Developed in the period December 2011 May 2012 by a multi disciplinary Working Group

10 Core Location Task Force co-chairs: Michael Lutz, Paul Smits, Andrea Perego (DG JRC) editor: Phil Archer (W3C) task force: Segun Alayande, Adam Arndt, Joseph Azzopardi, Chirsina Bapst, Serena Coetzee, Andreas Gehlert, Giorgios Georgiannakis, Anja Hopfstock, Andreas Illert, Michaela Elisa Jackson, Morten Lind, Matthias Lüttgert, Andras Micsik, Piotr Piotrowski, Greg Potterton, Peter Schmitz, Raj Singh, Athina Trakas, Rob Walker, Stuart Williams, Peter Winstanley,...

11 3 representation formats Conceptual model Re-use existing concepts in CCL, INSPIRE, etc. RDF schema Re-uses existing Linked Data vocabularies XML schema Re-uses Core Components Technical Specification (CCTS). ISA Open Metadata Licence v1.1 Maintained by W3C (Government Linked Data Working Group) 12

12 W3C Location and Address Community The W3C Location and Addresses Community Group is to review the existing efforts such as the Core Location Vocabulary and assess whether any use cases would be served by harmonization and/or new standardization work. It may produce specifications or use cases and requirements documents, which may be proposed for adoption by the W3C Government Linked Data (GLD) Working Group

13 INSPIRE data specifications Core Location can be seen as a subset of the INSPIRE address specification as it based on the INSPIRE AddressRepresentation class. INSPIRE XML versus Location RDF representation. The Location CV and INSPIRE are complementary A linked data service can be implemented on top of an INSPIRE representation.

14 Core Location Vocabulary data model 15

15 INSPIRE Data Specification on Addresses 16

16 3 Designing URI sets for location 1. Core Vocabularies for egovernment 2. Core Location Vocabulary 3. Designing URI sets for location 4. Core Location Pilot I.T.

17 UK Designing URI Sets for Location Spatial objects and corresponding information resources Spatial object: Digital resource:

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19 INSPIRE generic conceptual model Annex H (informative) Implementation of Identifiers using URIs in INSPIRE Use persistent HTTP URI to identify spatial things and spatial objects Resolving the URIs redirects (HTTP 303) to a download service that provides digital resources describing the spatial object or thing, e.g. in GML, JSON, HTML, RDF, etc.

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21 Benefits of URIs Enables the deployment of federated governance procedures Provides access to individual objects, while it remains possible to download whole datasets URI dereferencing and access to alternate formats (e.g. GML, RDF, JSON, CSV,...) Enables efficient management of shared data within and into business systems

22 4 Core Location Pilot - Interconnecting Belgian address data 1. Core Vocabularies for egovernment 2. Core Location Vocabulary 3. Designing URI sets for location 4. Core Location Pilot I.T.

23 DATA CONSUMER Unlinked Low quality Non-interoperable? Lack of common identifiers Heterogeneous data formats Data fragmentation UrBIS - Brussels Capital Region CRAB - Flanders PICC - Wallonia NGI National Civil register Geographic Institute 24

24 Interconnecting Belgian address registers XML view Xquery, Xpath DATA CONSUMER lookup, disambiguate, link SPARQL endpoint Linked address data Common Data models RDF view LOGD INFRASTRUCTURE INSPIRE XML and RDF views on relational data served over a Web interface sample address data in native format UrBIS - Brussels Capital Region CRAB - Flanders PICC - Wallonia NGI National Civil register Geographic Institute Core Location Pilot: 25

25 Combining XML, RDF, and Linked Data XML Client RDF Client Web Browser HTTP Web Application Server XML Processor SPARQL engine SQL Processor RDF Quad Store relational database external database OpenLink Virtuso

26 Alternatives: - D2RQ -SquirrelRDF Subject Predicate - Revelytix Spyder Object NGI_Road.NATIO NALREGISTRATIO N-NUMBER - URI rdf:type We used OpenlinkSW Virtuoso RDF Views and XML Views tnro:roa d locn:geographicna me locn:geometry STREETNAME TGID 27

27 Three use cases for data consumers UC3: Link datasets by means of address identifiers Address Identifier UC2: Look up (dereference) an address identifier Address Notation Example: ntation/spw/ UC1: Disambiguate (reconcile) an address notation Example: Chaussée de Bruxelles La Hulpe 28

28 UC1: Disambiguate (query) address notations SPARQL query on the triple store The query is converted into SQL and hits the relational tables of several data providers 29

29 UC2: Resolve Web identifiers 30

30 UC3: Link address data 31

31 UC3: Link address data 32

32 Conclusions Core Location ánd INSPIRE AD can be used to harmonise address data from disparate systems Core Location can be easily extended with (still experimental) INSPIRE RDF vocabularies URI sets for INSPIRE spatial objects and spatial things can accommodate both the XML (GML) and RDF world 33

33 Project Officer: Contractor: Visit our initiatives CORE PUBLIC SERVICE VOCABULARY SOFTWARE FORGES COMMUNITY ADMS. SW Get involved on Twitter Join SEMIC group on LinkedIn Join SEMIC community on Joinup 34