1. Dublinked Technology Workshop Overview
15th Dec 2011
Tim McCarthy, NUIM
IDC/EMC, 2011

2. Dublinked Technology Workshop Overview
14.40 – 15.20 Presentations
14.40 Transportation data – Data Access Issues Brendan O’Brien, DCC
14.50 Spatial Web services Eamonn Doyle, ESRI
15.00 Linked Data & Linked Data Catalogues Deirdre Lee & Fadi Maali, DERI
15.10 Semantic approach to Data Description Chis Matheus, Alcatel
15.20 – 15.50 Breakout Sessions
Group-1 Data Publishing Dominic Byrne
Group-2 Data Discovery Tim McCarthy
Group-3 Web Services Eamonn Doyle, ESRI
Group-4 Advanced Functions Pól MacAonghusa, IBM
15.50 – 16.25 Summary Presentation
4 X Groups Main points Spokesperson
All Conclusion, Actions
16.25 – 16.30 Wrap-up

3. Dublinked - The value of digital data
•EU Open Data Strategy (Released 12th Dec 2011)
http://ec.europa.eu/information_society/policy/psi/index_en.htm
Relevant Reports include:
•Euros140B IDC/EMC, 2011
(Vickery Study 2011) in direct/indirect economic gains from PSI
•Pricing of PSI
http://ec.europa.eu/information_society/policy/psi/docs/pdfs/report/11_2012/summary.pdf
•Models for Supply & Charging for PSI
http://ec.europa.eu/information_society/policy/psi/docs/pdfs/report/11_2012/models.pdf
•Apps Market Snapshot
http://ec.europa.eu/information_society/policy/psi/docs/pdfs/report/11_2012/apps_market.pdf

4. Background
At the heart of Dublinked is the idea that Dublin Local Authorities (as well as organizations in
the public, private & academic communities) generate large volumes of data pertaining to
Dublin City & region and would like to share this digital resource with wider society
However, in reality, there are technical, legal, commercial, political, organisational challenges
in sharing data:
Are organizations willing to share data and information? Does prevailing politics promote data sharing?
Do all stakeholders support the same philosophy? How to create incentives across different communities,
such as central government, commercial & academic to share data? Who pays for releasing data? Who is
responsible for maintaining data quality? How do metadata, citations, credits and data tagging promote
increased data sharing? How can you have context travel with data? Can we trace usage as approaches
to determine high value data? While search engines are often used to locate data and information, how
do portals provide curated, authoritative sources and build communities of collaboration? How are data
kept current? Who provides APIs, and higher level visualisation modules? How do we balance the need
for authoritative data and volunteered data? How do we safe-guard privacy? How do we support the
need for rapid access self-service data in the situations such as natural disasters and emergencies? How
do we maintain adequate controls to protect sensitive environmental information? Is licensing suitable
for product development & commercialisation? How can new web information service idea be tested?
People already have meaningful questions - how do we support their ability to generate information
about what they want to know? How do we scale up a regional collaborative data innovation platform
to the national level?...........................................

5. Responding to the needs for a new kind of story-telling, collaboration
& innovation
•Generation of vast quantities of digital data
•Digital advancements, disruptive technologies
•Open Data initiatives (Transparency, Economic, Engagement)
•Citizen participation
•Data Processing, Analysis & Visualisation were historically the preserve of the
computer-specialist, scientist & statistician
•Change in societal expectations – requirement of near real-time or predicted
information on mobile and web based
•Once information is published & discovered, what are the best approaches to turning
data & information into knowledge?

6. Technology Issues – Barriers, Enablers, Challenges & Opportunities
Data Publishing Web Services
•Data Sourcing •Static & Dynamic data streams
•Pre-processing data (Google Refine) •API
•Data Validation •Client-Server Architectures
•Cloud •SmartPhone & Mobile platforms
•Structures
•Formats
Data Discovery
•Metadata Advanced Functions
•Federated Data Catalogues •Analytics
•Local, Regional & National Platforms • Visualisation
•Search Tools •Collaboration
•Linked Data & Linked Data Catalogues

7. Open Cities – Technical Requirments & Open Government Data Platform
This document contains a list of requirements for the Open
Cities open data platform and contains a list of tool https://github.com/opengovplatform/opengovplatform
specifications. In Section 1, we present a general
overview of typical data management processes. Sections 3
and 4 contain a listing of functional and non-functional
requirements for the open data platform, respectively. In
Section 5 we list the specifications for varying tools that we
are currently considering for use in the open data platform.
http://opencities.net/sites/opencities.net/files/content-
files/repository/D4.4.2%20Requirements%20for%20tools%20for%20Open%20Data.pdf

8. Web Services Styles & APIs
Remote Procedure Call (RPC)
Distributed Function, not loosely coupled, related approaches include CORBA, Microsoft RPC .Net Remoting
Service Orientated Architecture (SOA)
Web services used to implement a SOA, message orientated, loose coupling, use enterprise service buses that combine
message orientated processing & Web services to create event driven SOA
Representational State Transfer (REST)
Attempt to describe architecture that use HTTP (or similar) by constraining the interface to standard, well know
operations (Get, Post, Put, Delete). The emphasis is interacting with a stateful resources rather than messages or
operations. Clean URLs are associated with REST concept. Architectures based on REST can use WSDL to describe SOAP
messaging over HTTP & can be implemented as an abstraction on top of SOAP or can be created without using SOAP at
all. Four basic design principles:
•Use HTTP methods explicitly.
•Be stateless.
•Expose directory structure-like URIs.
•Transfer XML, JavaScript Object Notation (JSON), or both.
API
API is typically a defined set of Hypertext Transfer Protocol (HTTP) request messages, along with a definition of the
structure of response messages, which is usually in an Extensible Markup Language (XML) or JavaScript Object Notation
(JSON) format.
While Web API is virtually a synonym for web service, the recent trend (so-called Web 2.0) has been moving away from
Simple Object Access Protocol (SOAP) based services towards more direct Representational State Transfer (REST) style
communications. Web APIs allow the combination of multiple services into new applications known as mashups.

9. Interoperability - Open Geospatial Consortium http://www.opengeospatial.org/
. OGC® Standards support interoperable solutions that "geo-enable" the Web, wireless and location-based services
and mainstream IT. The standards empower technology developers to make complex spatial information and services
accessible and useful with all kinds of applications. The OGC standards baseline comprises more than 30 standards,
including:
CSW - Catalog Service for the Web: access to catalog information
GML - Geography Markup Language:
GeoXACML - Geospatial eXtensible Access Control Markup Language
KML - Keyhole Markup Language:
Observations and Measurements
OGC Reference Model - a complete set of reference models
OWS - OGC Web Service Common
Sensor Observation Service[4] (SOS)
Sensor Planning Service[5] (SPS)
SensorML - Sensor Model Language
SFS - Simple Features - SQL
Styled Layer Descriptor (SLD)
WCS - Web Coverage Service:
WFS - Web Feature Service
WMS - Web Map Service: provides map images
WMTS - Web Map Tile Service: provides map image tiles
WPS - Web Processing Service: remote processing service

10. ProgrammableWeb - Mashups, APIs, and the Web as Platform
http://www.programmableweb.com/

11. Data SF – Real-time Parking & Pricing API

12. Guardian Newspaper (UK) Content API

13. TfL Cycle Hire
data is being scraped every
minute from the Barclays
Cycle Hire Map and is then
cached for further use

14. TfL Transportation Data Feeds

15. Tube API

16. Advanced Functions

17. THREDDS (Thematic Realtime Environmental Distributed Data Services)

18. ERDDAP – “middleman between you and various remote data servers”
http://coastwatch.pfeg.noaa.gov/erddap/index.ht
ml

19. GeoNode is an open source platform that facilitates the creation, sharing, and collaborative
use of geospatial data. The project aims to surpass existing spatial data infrastructure
solutions by integrating robust social and cartographic tools.

20. Weave – Analysis & Visualisation
http://ivpr.github.com/Weave/

21. Many Eyes - IBM
http://www-958.ibm.com/software/data/cognos/manyeyes/

22. Dashboards
Various Types
•Strategic
•Analytic
•Operational

23. SmartApps
App market (estimated to be US$35B in
2015).....PSI providing a significant percentage
of the underlying data to App development
eg Weather & Transport Apps. For
PSI, increased commercial potential for Smart
App development can be realised if data-
streams are multi-thematic, real-time and
readily integrated….need for clear
licensing/guidelines on use/re-
use....indications are we are still at the start
here in terms of market development.
Source :
http://ec.europa.eu/information_society/policy/psi/docs/pdfs/report/11_2012/app
s_market.pdf