YASGUI

Feeling the pulse of Linked Data

Laurens Rietveld
VU University Amsterdam
http://presentations.laurensrietveld.nl/ekaw2014

What we (don't) know about the LOD Cloud

Strengths and weaknesses of server logs

An Observational Lense

YASGUI Feature-set

  • Access to any SPARQL endpoint
  • Auto-completion
  • Syntax Highlighting
  • Full SPARQL 1.1 syntax support
  • Full SPARQL query results support
  • Syntax Checking
  • Platform independent
  • Retention of user settings
  • Easily bookmark and share queries
  • Easily search for endpoints
  • Downloading results

Latest Numbers

  • Tracking information of 57% of the user base
  • 80.000 queries
  • 4.600 users
  • Executed on ~600 endpoints

Completely different than server logs

The Basics

We write complex queries

Exploiting endpoint logs

Open vs. Closed LOD

We only use a fraction

Namespaces

Popularity

NamespaceDing et al. [1] prefix.cc YASGUI
rdf: 1 2 2
foaf: 2 3 6
dc: 3 5 10
rdfs: 4 6 1
admin: 5 39 none
rss: 6 9 251
vcard: 7 32 20
bio: 8 52 none
[1] Ding, Li, et al. "How the semantic web is being used: An analysis of foaf documents." HICSS'05

Popularity vs. Frequency

Conclusions

  • Unique observational lens
  • More than usage analysis alone