Get the Google Feeling! Supporting Users in Finding Relevant Sources

Supporting Users in Finding Relevant Sources of Linked Open Data at Web-Scale

Thomas Gottron, Ansgar Scherp, Bastian Krayer, Arne Peters

Get the Feeling!

Thomas Gottron BTC 2012 2Get the Google Feeling

System Support for Searchers

Bates, M.J.: Where should the person stop and the information search interface start? Information Processing and Management 26(5), 575–591 (1990)

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displayoptions

execute oncommand

automaticexecution

System involvement

Mov

e User activityTa

ctic

Strata

gem

Strate

gy

monitor andrecommend

OperationalSystems

(then)

Area of recommended development

Hold for later

Hold for later

(skip)

Pure user activity


System Support Helps: Query Specific Snippets

Tombros, A., Sanderson, M.: Advantages of query biased summaries in information retrieval.SIGIR’98. pp. 2–10 (1998)

Recall Precision

Speed Satisfaction


System Support Helps: Query Suggestions

Kelly, D., et al. Effects of popularity and quality on the usage of query suggestions during information search. CHI '10, p 45-54, (2010)

41% of all queries were chosen from suggestions

Find entry point Think out of the box Identify new query terms


Did you mean?

Result Set Size

Result Snippets

Related Queries

Ranked Retrieval


Schema-based Index Design


„Under the hood“

SPARQL

Snippets

Generalize

Retrieve Datasources

Query translation

Rank

Specify

Count

Select

Select

• 1 query for result set and result set size• N queries for ranking data and snippets• 2 queries per related query


Stats

Use of the complete BTC 2012 dataset Index size

133M schema triples 224M payload triples

Commodity hardware Data processing LODation service provision

Index construction (15h) and optimization (5h) Response time: < 1s on a single CPU machine

Get the Feeling!

Thank you!

Science

Get the Google Feeling! Supporting Users in Finding Relevant Sources