Date post: | 24-Jan-2018 |
Category: |
Art & Photos |
Upload: | opencubeproject |
View: | 736 times |
Download: | 1 times |
Kalampokis, Roberts, Karamanou, Tambouris, Tarabanis, Hermans
Challenges on Developing Tools for Exploi=ng Linked Open Data
Cubes
Bill Roberts
@billroberts hCp://swirrl.com
2 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
3 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
4 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Central Sta=s=cs Office, Ireland § Department for Communi=es and Local Government, UK § Sta=s=cs Office of Flanders, Belgium
5
Pilot partners: government sta=s=cs publishers
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
hCp://www.opencube-‐project.eu hCp://www.opencube-‐toolkit.eu
6 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
7
Publishing Pla^orms
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ hCp://opendatacommuni=es.org § hCp://sta=s=csbeta.com § hCp://data.hampshirehub.net § hCp://data.surreycc.gov.uk § hCp://gmdatastore.org.uk
8
Some examples of PublishMyData in use
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Understanding the 'shape' of the data § Selec=ng the slice(s) you want § Viewing it easily § Expor=ng it easily § Accessing via API (with/without SPARQL) § Combining data together from different datasets, different publishers § Knowing whether and how to aggregate it
9
Challenges
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Graher: hCp://graher.org § JSONstat2qb § R2RML
10
Producing RDF Data Cube data
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Design issues: user interfaces and user experience
§ Standardisa=on issues: describing the data to maximise interoperability
11
Challenges
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Analysts and researchers
§ Informa=on seekers
§ Developers of visualisa=ons and applica=ons
12
What kind of users?
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
13
hCp://digitalpublishing.ons.gov.uk/2014/04/02/the-‐persona-‐touch/
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
14 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Possibly lots of dimensions § Possibly long lists of possible values § Possibly 'sparse' cubes § Ensuring good performance of tools even with large data collec=ons
15
Understanding the shape of the data
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
16 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ CSV and Excel downloads of extracts § R § Visualisa=on libraries: d3.js, leaflet.js, Google maps/charts, Tableau…
17
Play nicely with other tools
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ ui:sortPriority -‐ other op=ons? § skos:broader and skos:narrower are not enough § è XKOS
§ Levels § Knowing whether a hierarchy is exhaus=ve and or exclusive § Hierarchies change over =me – e.g. administra=ve geography
18
Ordering and hierarchy of code lists
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
19 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Metadata to indicate 'aggregatability' § XKOS to describe hierarchies
§ Combine the sta=s=cal data with external reference and structural data
§ Ra=os – link to numerator and denominator observa=ons
20
Aggrega=on
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ A denser network of interlinks § BeCer discovery of re-‐usable code lists and ontologies § Auto-‐processing of equivalent concepts § Different approaches to measure proper=es:
§ numberOfPeopleWithDemen=aInLondon § numberOfPeopleWithDemen=a (plus refArea = London) § numberOfPeople (refArea=London, condi=on=demen=a) § number (unitMeasure=People, refArea=London, condi=on=demen=a) § obsValue
§ Is there a shortlist of standard measures that would be useful?
21
Improving interoperability of data cubes
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ Several choices for represen=ng measures § Aggrega=on § Hierarchical code lists
§ Choices/paCerns for 'where to put the seman=cs' – measure, unit, dimensions
§ Recommend use of XKOS? § Metadata for aggregatability (including ra=os)
22
What's missing from the RDF Data Cube vocabulary?
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
23 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
24 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
§ We s=ll love Linked Data and RDF Data Cube! § We've persuaded some sta=s=cians to love it too § Understand the audience and design for them § Opportuni=es for improved standardisa=on and guidance
25
Conclusion
19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014
Thanks!
[email protected] [email protected]
26 19 October 2014, Riva del Garda, Italy ISWC 2014 – SemStats 2014