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WDPlus:
Leveraging Wikidata to Link and
Extend Tabular Data
Daniel Garijo, Pedro Szekely
Information Sciences Institute and
Department of Computer Science
@dgarijov
dgarijo@isi.edu
Abundance of data sources in the Web
Users of data face three challenges
• How do I find relevant datasets
for my problem?
• How do I augment my dataset
with existing information?
• How can I share my integrated
results with the community?
Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
2
Raw data
Popular initiatives for addressing these challenges
• Search individual items
• Search is manual, based on user input
• LOD cloud of connected datasets
• Knowledge engineers are needed to map and
augment content
• ETL Frameworks (e.g, Karma, Open Refine)
• Pipelines are custom, expertise required
• Often not shared
Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
3
Sources: https://lod-cloud.net/versions/2019-03-29/lod-cloud.png; https://panoply.io/data-warehouse-guide/3-ways-to-build-an-etl-process/
WDPlus
A framework designed to:
• Discover data on the Web
• Improve raw data to make it useful
• Search, querying dataset structure
• Download fresh data
• Combine existing dataset
• Share improved data and methods
Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
4
1953-01-20
Harry Truman
Lamar
President
USA
1884-05-08
1972-12-26
male
1945-04-12
Bress Truman
weath
er
shoppi
ng
crime
sports
Core
Satellites
Metadata index
WDPlus architecture
Wikidata as a core KG
• 60 Million items
• 700 Million statements
• 20,000 + contributors
• +1 billion edits
• Collaborative!
5
1953-01-20
Harry Truman
Lamar
President
USA
1884-05-08
1972-12-26
male
1945-04-12
Bress Truman
Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
Core
WDPlus architecture
Satellite organization
• Detailed information on a domain
• Crime records, sport events, etc.
• Linked to the Wikidata core
• Link first strategy
• Custom properties and Qnodes
• Extensions to core model
• Synchronized with core
• Decentralized
• 1 satellite may be maintained by 1
community
6Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
1953-01-20
Harry Truman
Lamar
President
USA
1884-05-08
1972-12-26
male
1945-04-12
Bress Truman
weath
er
shoppi
ng
crime
sports
Core
Satellites
WDPlus architecture
Table models
• Tables are not materialized
• Able to become a satellite under
demand
• Described in machine-readable
metadata index
• Indexing columns names and
relevant instances for fast retrieval
• Link to table model is preserved
7Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
1953-01-20
Harry Truman
Lamar
President
USA
1884-05-08
1972-12-26
male
1945-04-12
Bress Truman
weath
er
shoppi
ng
crime
sports
Core
Satellites
Metadata index
Towards WDPLus
8Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
1953-01-20
Harry Truman
Lamar
President
USA
1884-05-08
1972-12-26
male
1945-04-12
Bress Truman
weath
er
shoppi
ng
crime
sports
Core
Satellites
Metadata index
WDPlus framework: Metadata index and
table Augmentation
• Search
• Keywords, variables or content
• Wikifier may be used in search
• Download
• Download a dataset or its metadata
• Augment
• Merge your dataset with contents from
other datasets automatically
• Upload
• Add new datasets (automated metadata
profiling and provenance)
• Enrich
• Header enrichment for search efficiency
9Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
WDPlus framework: T2WML
10Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
Table overview
Cell-based mapping.
This mapping is
saved in WDPlus for
future reference
Entity Linking
Result sample
Easy to share!
Creating Wikidata Satellites: Challenges
• Identify new properties to model satellites
• Currently done by hand by Knowledge engineers
• Creation of new Qnodes for satellite instances
• Identified a schema for each satellite
• Feedback loop to Wikidata
• How to select a “trusty” statement when several values are available?
• Namespace issues
• Single namespace, or namespace per satellite?
• Inter-satellite linkages
11Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
Conclusions
• Tabular data exists in heterogeneous formats
• Difficult to find, use, augment and share
• WDPlus is a framework to help discover, improve, search, augment,
combine and share tabular data
• WDPlus framework for profiling and enriching datasets
• T2WML language to generate linked instances from tabular data
• Encouraging early results on usability
12Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
Help us extend WDPlus!
Do you have comments, suggestions or use cases? Contact me at:
Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend
Tabular Data. AKTS 2019 (eScience 2019)
13
dgarijo@isi.edu

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WDPlus: Leveraging Wikidata to Link and Extend Tabular Data

  • 1. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data Daniel Garijo, Pedro Szekely Information Sciences Institute and Department of Computer Science @dgarijov dgarijo@isi.edu
  • 2. Abundance of data sources in the Web Users of data face three challenges • How do I find relevant datasets for my problem? • How do I augment my dataset with existing information? • How can I share my integrated results with the community? Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) 2 Raw data
  • 3. Popular initiatives for addressing these challenges • Search individual items • Search is manual, based on user input • LOD cloud of connected datasets • Knowledge engineers are needed to map and augment content • ETL Frameworks (e.g, Karma, Open Refine) • Pipelines are custom, expertise required • Often not shared Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) 3 Sources: https://lod-cloud.net/versions/2019-03-29/lod-cloud.png; https://panoply.io/data-warehouse-guide/3-ways-to-build-an-etl-process/
  • 4. WDPlus A framework designed to: • Discover data on the Web • Improve raw data to make it useful • Search, querying dataset structure • Download fresh data • Combine existing dataset • Share improved data and methods Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) 4 1953-01-20 Harry Truman Lamar President USA 1884-05-08 1972-12-26 male 1945-04-12 Bress Truman weath er shoppi ng crime sports Core Satellites Metadata index
  • 5. WDPlus architecture Wikidata as a core KG • 60 Million items • 700 Million statements • 20,000 + contributors • +1 billion edits • Collaborative! 5 1953-01-20 Harry Truman Lamar President USA 1884-05-08 1972-12-26 male 1945-04-12 Bress Truman Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) Core
  • 6. WDPlus architecture Satellite organization • Detailed information on a domain • Crime records, sport events, etc. • Linked to the Wikidata core • Link first strategy • Custom properties and Qnodes • Extensions to core model • Synchronized with core • Decentralized • 1 satellite may be maintained by 1 community 6Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) 1953-01-20 Harry Truman Lamar President USA 1884-05-08 1972-12-26 male 1945-04-12 Bress Truman weath er shoppi ng crime sports Core Satellites
  • 7. WDPlus architecture Table models • Tables are not materialized • Able to become a satellite under demand • Described in machine-readable metadata index • Indexing columns names and relevant instances for fast retrieval • Link to table model is preserved 7Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) 1953-01-20 Harry Truman Lamar President USA 1884-05-08 1972-12-26 male 1945-04-12 Bress Truman weath er shoppi ng crime sports Core Satellites Metadata index
  • 8. Towards WDPLus 8Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) 1953-01-20 Harry Truman Lamar President USA 1884-05-08 1972-12-26 male 1945-04-12 Bress Truman weath er shoppi ng crime sports Core Satellites Metadata index
  • 9. WDPlus framework: Metadata index and table Augmentation • Search • Keywords, variables or content • Wikifier may be used in search • Download • Download a dataset or its metadata • Augment • Merge your dataset with contents from other datasets automatically • Upload • Add new datasets (automated metadata profiling and provenance) • Enrich • Header enrichment for search efficiency 9Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019)
  • 10. WDPlus framework: T2WML 10Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) Table overview Cell-based mapping. This mapping is saved in WDPlus for future reference Entity Linking Result sample Easy to share!
  • 11. Creating Wikidata Satellites: Challenges • Identify new properties to model satellites • Currently done by hand by Knowledge engineers • Creation of new Qnodes for satellite instances • Identified a schema for each satellite • Feedback loop to Wikidata • How to select a “trusty” statement when several values are available? • Namespace issues • Single namespace, or namespace per satellite? • Inter-satellite linkages 11Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019)
  • 12. Conclusions • Tabular data exists in heterogeneous formats • Difficult to find, use, augment and share • WDPlus is a framework to help discover, improve, search, augment, combine and share tabular data • WDPlus framework for profiling and enriching datasets • T2WML language to generate linked instances from tabular data • Encouraging early results on usability 12Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019)
  • 13. Help us extend WDPlus! Do you have comments, suggestions or use cases? Contact me at: Daniel Garijo and Pedro Szekely. WDPlus: Leveraging Wikidata to Link and Extend Tabular Data. AKTS 2019 (eScience 2019) 13 dgarijo@isi.edu