Linked open data, its realization

2nd Korea-UK Data Workshop with ODI

2nd Korea-UK Data Workshop with ODI / Dec 15, 2015

• Research Engineer @Saltlux

• Managing Director @ODI Seoul

• Core team member @Open Knowledge Korea

Seonho Kim

Interests: Semantic technologies, Linked Open Data, Artificial intelligence

SNS - ksseono @Facebook / SeonhoKim @TwitterEmail - [email protected]


Saltlux, Inc.

• http://www.saltlux.com• Top 10 Global Semantic Technology Company• AI and BigData R&D for 30 years• 80 domestic/oversea patents• Semantic Web Challenge (ISWC) winner, 2011• ODI Seoul Node


Open Data Barometer 2013


Ranked top 12 among 77 countries

GOAL: UP TO TOP 5

Open Data Barometer 2013, Korea


Open Data Barometer 2014, Korea


Strategic Issues Budget Issues Privacy Issues

Challenges for Open Gov. Data ...


But, Data Quality!

(Reasoning Web, Manolis et al.)


But, Data Quality!


• Difficult to define relations among datasets

• Difficult to connect and integrate between the heterogeneous datasets

• Naive metadata

• Difficult to indicate the same information between the heterogeneous datasets

• Language barrier -written only in Korean

• City centric data -limited to co-operate for the public purpose

321 Fragmented Data Brocken Data limited Data

Linked Data - As Is


Linked Data - How? : Process

Data�AnalysisLD�System�Implementing

Data�Modeling Data�Enriching

1 2 3 4

• Collect various datasets of the cultural assets, facilities, market and so on

• Excel to RDB

• Extract common entities

• Select RDF vocabularies

• Define a specification for the use-case ontology

• Define a guideline for naming entity URIs

• Design the relations

• Define additional metadata

• Connect the datasets

• Validate RDF data

• Construct SPARQL Endpoint

• Implement UI / Visualization

• Use Case - Linked Open Data Service for Seoul City by Open Knowledge Korea


Linked Data - How? : Architecture

Data�Sets

Transforming�Rules

TransformingTools

RelFinder

Linked�Data�System

Protégé�/TopBriad�Composer

Google�Refine

MySQL

ARC2 SPARQL�Endpoint

Pubby

UI

UI

UI

Refine�RDF�Extension

• Use Case - Linked Open Data Service for Seoul City by Open Knowledge Korea


1. Data Source 2. Design Model

4. Design Data Pages

5. Compose URLsfor the Data Pages

6. ComposeData Pages in HTML

7. Grant URIs for the Entities

3. Construct RDF data

8. Input Metadata for the Data Pages

9. Connect other Linked Data

Implementing Linked Data


RDFRDF RDF RDF RDF

Accessing Linked Data


Advantages of Linked Datawe usually say..

1. Reuse of Data

2. Reducing the management cost

3. Interoperability for the integrated datasets

... Really?


Linked Open Data World, anyway


Linked Data Open World, really enough?


Linked Data - How?

→ This is only about agreements

for protocols, standard formats

and their definitions,

not about accessing/querying

those ‘distributed' data.


Linked Data - How?

* Web-Scale Querying through Linked Data Fragments, Multimedia Lab in Ghent University


Linked Data - use cases in Korea

• Linked Data System for Kyunggi-do Governmentby Saltlux & Open Knowledge Korea


Linked Data - use cases in Korea• Linked Data System for Intellectual Properties by Saltlux


Conclusion

Importance of Linked Data technologies to make real/practical of the benefits of Open Data

It’s all aboutOpen Data Qualityand Implementation of the applications/services

Q&A

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Thank You

Linked open data, its realization

Data & Analytics

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