HTTP/2 200 date: Mon, 06 Oct 2025 19:49:32 GMT content-type: text/turtle; charset=utf-8 content-length: 7000 cf-ray: 98a7aebafc876cd6-BLR content-location: ldqd.ttl vary: negotiate,Origin, Accept-Encoding tcn: choice last-modified: Tue, 17 May 2016 17:56:23 GMT etag: "1b58-5330d75881fc0;602036b0d5b8d cache-control: max-age=21600 expires: Tue, 07 Oct 2025 01:49:32 GMT access-control-allow-origin: * x-backend: www-mirrors x-request-id: 98a7aebafc876cd6 strict-transport-security: max-age=15552000; includeSubdomains; preload content-security-policy: frame-ancestors 'self' https://cms.w3.org/ https://cms-dev.w3.org/; upgrade-insecure-requests cf-cache-status: BYPASS accept-ranges: bytes set-cookie: __cf_bm=bR8U9cA7em.GGYdm5PYnkzWZ0VWQI51TG5kdvfQefTk-1759780172-1.0.1.1-4lDE6TC8RI8CiNzCzXTvnnOY8BODuf5xu7ABHzL8gaN50hEw8ry_FVV.I8VAIevjFFTwKFBh_m4rkXPkk0KwILAcMs7CkrsEVnEw.bRy1Gc; path=/; expires=Mon, 06-Oct-25 20:19:32 GMT; domain=.w3.org; HttpOnly; Secure; SameSite=None server: cloudflare alt-svc: h3=":443"; ma=86400 @prefix dqv: . @prefix rdf: . @prefix owl: . @prefix rdfs: . @prefix skos: . @prefix ldqd: . # Representation of quality categories and dimensions from Amrapali Zaveri, Anisa Rula, Andrea Maurino, Ricardo Pietrobon, Jens Lehmann, Sören Auer: Quality assessment for Linked Data: A Survey. Semantic Web 7(1): 63-93 (2016) https://dx.doi.org/10.3233/SW-150175 # Definition of categories ldqd:accessibilityDimensions a dqv:Category ; skos:prefLabel "Accessibility"@en . ldqd:intrinsicDimensions a dqv:Category ; skos:prefLabel "Intrinsic dimensions"@en . ldqd:contextualDimensions a dqv:Category ; skos:prefLabel "Contextual dimensions"@en . ldqd:representationalDimensions a dqv:Category ; skos:prefLabel "Representational Dimensions"@en . # Definition of dimensions ## Under Accessibility Dimensions ldqd:availability a dqv:Dimension ; dqv:inCategory ldqd:accessibilityDimensions ; skos:prefLabel "Availability"@en ; skos:definition "Availability of a dataset is the extent to which data (or some portion of it) is present, obtainable and ready for use."@en . ldqd:licensing a dqv:Dimension ; dqv:inCategory ldqd:accessibilityDimensions ; skos:prefLabel "Licensing"@en ; skos:definition "Licensing is defined as the granting of permission for a consumer to re-use a dataset under defined conditions."@en . ldqd:interlinking a dqv:Dimension ; dqv:inCategory ldqd:accessibilityDimensions ; skos:prefLabel "Consistency"@en ; skos:definition "Interlinking refers to the degree to which entities that represent the same concept are linked to each other, be it within or between two or more data sources."@en . ldqd:security a dqv:Dimension ; dqv:inCategory ldqd:accessibilityDimensions ; skos:prefLabel "Security"@en ; skos:definition "Security is the extent to which data is protected against alteration and misuse."@en . ldqd:performance a dqv:Dimension ; dqv:inCategory ldqd:accessibilityDimensions ; skos:prefLabel "Performance"@en ; skos:definition "Performance refers to the efficiency of a system that binds to a large dataset, that is, the more performant a data source is the more efficiently a system can process data."@en . ## Under Intrinsic Dimensions ldqd:syntacticValidity a dqv:Dimension ; dqv:inCategory ldqd:intrinsicDimensions ; skos:prefLabel "Syntactic validity"@en; skos:definition "Syntactic validity is defined as the degree to which an RDF document conforms to the specification of the serialization format."@en . ldqd:semanticAccuracy a dqv:Dimension ; dqv:inCategory ldqd:intrinsicDimensions ; skos:prefLabel "Semantic accuracy"@en ; skos:definition "Semantic accuracy is defined as the degree to which data values correctly represent the real world facts."@en . ldqd:consistency a dqv:Dimension ; dqv:inCategory ldqd:intrinsicDimensions ; skos:prefLabel "Consistency"@en ; skos:definition "Consistency means that a knowledge base is free of (logical/formal) contradictions with respect to particular knowledge representation and inference mechanisms."@en . ldqd:conciseness a dqv:Dimension ; dqv:inCategory ldqd:intrinsicDimensions ; skos:prefLabel "Conciseness"@en ; skos:definition "Conciseness refers to the minimization of redundancy of entities at the schema and the data level."@en . ldqd:completeness a dqv:Dimension ; dqv:inCategory ldqd:intrinsicDimensions ; skos:prefLabel "Completeness"@en; skos:definition "Completeness refers to the degree to which all required information is present in a particular dataset."@en . ## Under Contextual Dimensions ldqd:relevancy a dqv:Dimension ; dqv:inCategory ldqd:contextualDimensions ; skos:prefLabel "Relevancy"@en ; skos:definition "Relevancy refers to the provision of information which is in accordance with the task at hand and important to the users’ query."@en . ldqd:trustworthiness a dqv:Dimension ; dqv:inCategory ldqd:contextualDimensions ; skos:prefLabel "Trustworthiness"@en ; skos:definition "Trustworthiness is defined as the degree to which the information is accepted to be correct, true, real and credible."@en . ldqd:understandability a dqv:Dimension ; dqv:inCategory ldqd:contextualDimensions ; skos:prefLabel "Understandability"@en ; skos:definition "Understandability refers to the ease with which data can be comprehended without ambiguity and be used by a human information consumer."@en . ldqd:timeliness a dqv:Dimension ; dqv:inCategory ldqd:contextualDimensions ; skos:prefLabel "Timeliness"@en ; skos:definition "Timeliness measures how up-to-date data is relative to a specific task."@en . ## under Representational dimensions ldqd:representationalConciseness a dqv:Dimension ; dqv:inCategory ldqd:representationalDimensions ; skos:prefLabel "Representational-conciseness"@en ; skos:definition "Representational-conciseness refers to the representation of the data, which is compact and well formatted on the one hand and clear and complete on the other hand."@en . ldqd:interoperability a dqv:Dimension ; dqv:inCategory ldqd:representationalDimensions ; skos:prefLabel "Interoperability"@en ; skos:definition "Interoperability is the degree to which the format and structure of the information conforms to previously returned information as well as data from other sources."@en . ldqd:interpretability a dqv:Dimension ; dqv:inCategory ldqd:representationalDimensions ; skos:prefLabel "Interpretability"@en ; skos:definition "Interpretability refers to technical aspects of the data, that is, whether information is represented using an appropriate notation and whether the machine is able to process the data."@en . ldqd:versatility a dqv:Dimension ; dqv:inCategory ldqd:representationalDimensions ; skos:prefLabel "Versatility"@en ; skos:definition "Versatility refers to the availability of the data in different representations and in an internationalized way."@en . ## Relations between dimensions ldqd:availability skos:related ldqd:performance , ldqd:interlinking . ldqd:semanticAccuracy skos:related ldqd:timeliness , ldqd:trustworthiness , ldqd:consistency , ldqd:syntaticValidity , ldqd:completeness , ldqd:interlinking . ldqd:consistency skos:related ldqd:conciseness , ldqd:syntaticValidity , ldqd:interoperability . ldqd:interoperability skos:related ldqd:conciseness , ldqd:syntaticValidity . ldqd:conciseness skos:related ldqd:completeness , ldqd:representationalConciseness . ldqd:interpretability skos:related ldqd:versatility . # Note: skos:related is a symmetric property, hence from every statement # ex:subject skos:related ex:object in this example, one can infer that # the statement ex:object skos:related ex:subject is true.