Short update presentation on revised URI patterns for public sector linked data publishing. UKGovLD F2F meeting in Manchester 19th June 2013

1. Public Sector Data Publishing
URI Patterns
Stuart Williams
skw@epimorphics.com

2. Why Patterns?
 Capture’s ‘canned thought’ or idiom
 Recognisable when used consistently
 Useful when correctly triggers intuitions in
 Developers
 Data consumers

3. Why URI?
MAN
03600
7000000000018821
GB108050014050
100866
M62
M15NH
ukc2102-03600
2003/1238

4. URI Sets for the UK Public Sector
 Published Oct 2009
 Basis of several pilot through to
Business As Usual Services
 Impact outside UK
 EU, study on persistent URI;
 Netherlands, Finland
 Issues:
 Focussed on URI mainly on:
http://{sector}.data.gov.uk/.*
 Governance
 Trading-Funds, Devolved and Local Admin
 Practicalities of Multi-tenancy

5. Aiming point…
 Framing Document
 Framework, Definitions,
 document map
 URI Patterns ('this' document)
 URI Patterns for INSPIRE
 Metadata for Data Quality, Provenance and Scope
 Governance:
 Roles and responsibilities of data publishers.
 Publishing principles.
 Registers and Registries
 Versioning data and vocabularies

6. Evolution
http://{sector}.data.gov.uk/{type}[/{concept}/{key}]+
http://{domain}{/collection*}[/{type}][/{concept}/{key}]+
Enables coarse grain request routing
cf. register based proxy/redirection
Scoped broadened beyond
data.gov.uk
{type}
def for terms and definitions
id for ‘things’
doc for reference doc about ‘things’
data for record oriented ‘data’
so for spatial-objects (INSPIRE)
Collection
A cohesive grouping of URI Sets, Datasets andVocabularies
published as a unit.
Changes in publishing authority/responsibility assumed at
granularity of collection.

7. Domain and Collection Naming
 Avoid
 Facets prone top change
 Organisation Names
 Product/Brand names
 Approval Status/Disposition
 experimental, draft…
 Natural Language distinctions
(@en, @cy)
 Plan for Eventual Change
 Use metadata to set
expectations.
 Have a transition plan ready.
https://docs.google.com/document/d/1Id8GSMAgiWWOaKsn1TUqXPgZ17tyoKp2oKqM9UvDnjE/edit#

8. URI for INSPIRE Spatial Object (/so)
 Published May 2011
 Basis of some pilots through BAU
services
 Growing interest in Linked Data for
INSPIRE delivery (in UK and EU)
 Issues/drivers for change:
 Focussed on
http://location.data.gov.uk/.*
 Relaxed constraints on INSPIRE
namespaceIDs – can now be http: URI
 Multi-tenancy
 Reduced pattern complexity

9. Evolution (work in progress)
http://location.data.gov.uk/so/{theme}/{featureType}/{namespace}/{localId}[/{version}]
http://{domain}{/collection*}[/so][/{id-space}]/{localId}[/{version}]
c.f. namespace
Same as LHS of generic pattern.
so’s published in own domain.

10. Evolution (work in progress)
Common shared definitions:
http://location.data.gov.uk/def/{theme}[/{application-schema}][/{featureType}]/{term}
Local definitions
http://{domain}/{collection}/def[/{local-schema}][/{featureType}]/{term}