1. Validata: An online tool for
testing RDF data conformance
Alasdair J G Gray
A.J.G.Gray@hw.ac.uk
alasdairjggray.co.uk
@gray_alasdair

2. Acknowledgements
 Co-authors: Heriot-Watt MEng students
 Jacob Baungard Hansent
 Andrew Beveridge
 Roisin Farmer
 Leif Gehrmann
 Sunil Khutan
 Tomas Robertson
 Johnny Val
 W3C HCLS Interest Group
 Eric Prud’hommeaux
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3. Motivation: HCLS Dataset
Descriptions
W3C Interest Group Note
http://www.w3.org/TR/hcls-dataset/
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4. Goal
 Provide an online validation tool
 Deployable on W3C server
 API
 Support multiple constraints
 Enable different requirement levels
 Different levels of user messages:
 Error
 Warning
 Information
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5. Approach: Data Shapes
Shape
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Data
<Dataset> rdf:langString
.
✗

6. <Dataset> {
`MUST` rdf:type (dctypes:Dataset),
`MUST` dct:title rdf:langString,
`MAY` dct:alternative rdf:langString+,
`MUST` !dct:created .
}
Shape Expressions (ShEx)
Shape
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<Dataset> rdf:langString
.
✗

7. Requirement Levels
Shape
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<Dataset> rdf:langString
.
✗
<Dataset> {
`MUST` rdf:type (dctypes:Dataset),
`MUST` dct:title rdf:langString,
`MAY` dct:alternative rdf:langString+,
`MUST` !dct:created .
}

8. http://www.w3.org/2015/03/ShExValidata/
VALIDATA DEMO

9. Validata
https://github.com/HW-SWeL/Validata
 RDF constraint validation tool
 Shape Expression (ShEx) constraints
 Open source javascript implementation
9 December 2015 Validata – SWAT4LS 2015 9
www.alasdairjggray.co.uk
A.J.G.Gray@hw.ac.uk
@gray_alasdair