1. Dataset Search
王夏霞

2. Background Thousands of data repositories on the web Visualization
aims
Thousands of data repositories on the web
Easy access to datasets
need
Visualization
Scientists, data journalists live and breath data
Dataset search engine
Interactive search
Datahub, data.gov, … …
Google Dataset Search
——Google,
“Google Scholar for Data”
LODAtlas
—— project-team ILDA at Inria, CNRS and Université Paris-Sud

3. “Google Scholar for data”

4. Architecture
Provided by Datasets’ Providers
Processing and
Enriching

5. Technologies Backend: Frontend:
1, Using Structured Metadata from Data Providers
——open standards (schema.org, W3C DCAT, JSON-LD, etc.)
2, Connecting Replicas of Datasets
3, Reconciling to the Google Knowledge Graph
4, Linking to other Google Resources 
Frontend:
Search and Ranking of Results (Google Web ranking + Additional signals)

6. Weakness 1, Rely on Metadata and providers ——“not showing up” problem
2, Data citation are approximate
——lack a good model
3, Ranking algorithms need to be improved
4, Lack of visualization
——e.g. Snippets ……

7. Another Dataset Search Engine——LODAtlas
—— project-team ILDA at Inria, CNRS and Université Paris-Sud

8. Achievements Two means to browse datasets: using keyword/URI Search
using faceted navigation
Refine the results Interactively:
Charts and timelines
Visual Summaries of a Dataset’s Contents:
Dataset’s ID card
Interactive RDF summary visualization
Vocabularies
Analytics tab

9. Examples of Use 1, Performing advanced searches
——Combination of Metadata & contents
2, Monitoring datasets
——e. g. DBPedia
3, Spotting noteworthy events
4, Comparing & contrasting the contents
——RDFQuotients-based visual summaries

10. Architecture Frontend Backend Database Metadata Extract classes…
Summaries
Java App

11. Workflow

12. Weakness
1, Each submission will be manually checked prior to inclusion
2, Some entries might be missing information ……
Future Work
1, Considering additional catalogs
2, Show partial views on vocabulary definitions based on solutions ……

13. Google Dataset Search:
Reference
Google Dataset Search:
LODAtlas: