StandardGuidancev1.0.0

ISO/IEC 5259 series: data quality for analytics and machine learning

The five-part international series on data quality, in practice the most usable structure for the Article 10 data governance dossier.

The official source remains authoritative. This is general information about obligations and not legal advice. See this object on the map

Address and citation

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Identifier: praxikon:eu:ai-act:standard:standard-iso-iec-5259-data-quality-machine-learning
Payload hash (sha256): 9fcb6844fee38f7cddc5546b1fc8835cbf284965148c69abc788b201cb2c685e

Citation line

Praxikon, "ISO/IEC 5259 series: data quality for analytics and machine learning", praxikon:eu:ai-act:standard:standard-iso-iec-5259-data-quality-machine-learning@1.0.0, dataset praxikon:sys:registry:dataset:ai-act-implementation-graph 2.1.0 (schema 1.4.0), effective_at 2026-08-08T00:00:00.000Z, known_at 2026-08-14T00:00:00.000Z, sha256 9fcb6844fee38f7cddc5546b1fc8835cbf284965148c69abc788b201cb2c685e

Version: 1.0.0
Legal time (effective_at): 8 August 2026
Knowledge time (known_at): 8 August 2026
Closed on: Not closed
Topics: standards

Review status: Placed against the official source (8 August 2026). Next check due by 4 February 2027. The check date is the knowledge date of this version; no later recheck has been recorded.

What this object links to

Every relation appears below as a path: from the source with its locator, through the conditions and exceptions of the object carrying the relation, to the consequence. A locator belongs to a statement in the data and not to a relation, so the source is the source anchor of the carrying object.

The obligation this hangs off

1 of 1 shown

The object belongs to this obligation. The source line it hangs off sits there.

Source
Official fact on this object, with its locator.
- ISO/IEC JTC 1/SC 42: international standards for artificial intelligence
  Locator: ISO/IEC 5259 series, ISO/IEC JTC 1/SC 42
  praxikon:eu:ai-act:source:iso-iec-jtc1-sc42
  Open official source
- EU Artificial Intelligence Act 2024/1689
  Locator: Article 10
  praxikon:eu:ai-act:source:reg-eu-2024-1689
  Open official source
Via
No condition or exception recorded on this object.
Consequence
- ObligationArticle 10: data and data governance
  praxikon:eu:ai-act:obligation:article-10-data-governance

What this object is about

1 of 1 shown

The object is about this role. Undifferentiated: it does not follow that the duty rests on this role.

Source
Official fact on this object, with its locator.
- ISO/IEC JTC 1/SC 42: international standards for artificial intelligence
  Locator: ISO/IEC 5259 series, ISO/IEC JTC 1/SC 42
  praxikon:eu:ai-act:source:iso-iec-jtc1-sc42
  Open official source
- EU Artificial Intelligence Act 2024/1689
  Locator: Article 10
  praxikon:eu:ai-act:source:reg-eu-2024-1689
  Open official source
Via
No condition or exception recorded on this object.
Consequence
- ActorProvider of an AI system
  praxikon:eu:ai-act:actor:provider

What this object states

Official fact

Attributable to a named primary source, with a locator. Where they differ, the official source prevails.

The ISO/IEC 5259 series (Artificial intelligence: Data quality for analytics and machine learning) comprises five parts: part 1 (overview, terminology and examples), part 2 (data quality measures), part 3 (data quality management requirements and guidelines) and part 4 (data quality process framework), all published in 2024, plus part 5 (data quality governance framework), published in February 2025. CEN-CENELEC has adopted parts as European standards, including EN ISO/IEC 5259-4:2025 and EN ISO/IEC 5259-3:2025. No part is cited in the Official Journal, so no presumption of conformity under Article 40 arises. The deliverable intended to do so for Article 10 is prEN 18284.
- Locator: ISO/IEC 5259 series, ISO/IEC JTC 1/SC 42praxikon:eu:ai-act:source:iso-iec-jtc1-sc42Open official source
- Locator: Article 10praxikon:eu:ai-act:source:reg-eu-2024-1689Open official source

Our interpretation

Our own reading. It can change without the law changing, and it is not the position of a supervisory authority.

This is currently the most concrete help available for Article 10, because part 2 actually makes data quality measurable rather than merely discussing it. What it is not: coverage of Article 10. The regulation asks for things the series does not address, such as examination for possible bias with a view to fundamental rights and representativeness for the specific intended user population in the EU. A dataset scoring well on every 5259 measure can still structurally under-represent a population group.
- Locator: ISO/IEC 5259 series, ISO/IEC JTC 1/SC 42praxikon:eu:ai-act:source:iso-iec-jtc1-sc42Open official source
- Locator: Article 10praxikon:eu:ai-act:source:reg-eu-2024-1689Open official source

Recommended step

A practical step we consider appropriate. Not an obligation following from the Regulation.

Use part 2 to fix a small number of hard quality measures per dataset and part 4 to describe the process that maintains them. Add two AI Act fields the series does not cover: representativeness for the intended user population, and the outcome of the bias examination with the measures taken. Retain the measurement results per dataset version, not only for the latest version.
- Locator: ISO/IEC 5259 series, ISO/IEC JTC 1/SC 42praxikon:eu:ai-act:source:iso-iec-jtc1-sc42Open official source
- Locator: Article 10praxikon:eu:ai-act:source:reg-eu-2024-1689Open official source

When this applies

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Referring to this object

Citation block

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Reference

Praxikon, "ISO/IEC 5259 series: data quality for analytics and machine learning",
praxikon:eu:ai-act:standard:standard-iso-iec-5259-data-quality-machine-learning@1.0.0,
dataset praxikon:sys:registry:dataset:ai-act-implementation-graph 2.1.0 (schema 1.4.0),
effective_at 2026-08-08T00:00:00.000Z, known_at 2026-08-08T00:00:00.000Z,
sha256 9fcb6844fee38f7cddc5546b1fc8835cbf284965148c69abc788b201cb2c685e,
https://www.praxikon.com/en/verkenner/standard/standard-iso-iec-5259-data-quality-machine-learning
(https://www.praxikon.com/api/v1/entities?id=praxikon%3Aeu%3Aai-act%3Astandard%3Astandard-iso-iec-5259-data-quality-machine-learning&effective_at=2026-08-08&known_at=2026-08-08&lang=en, accessed 2026-08-25)

Short form

praxikon:eu:ai-act:standard:standard-iso-iec-5259-data-quality-machine-learning@1.0.0 (sha256 9fcb6844)

BibTeX

@misc{praxikon-eu-ai-act-standard-standard-iso-iec-5259-data-quality-machine-learning-1-0-0,
  author       = {{Praxikon}},
  title        = {ISO/IEC 5259 series: data quality for analytics and machine learning},
  year         = {2026},
  version      = {1.0.0},
  number       = {praxikon:eu:ai-act:standard:standard-iso-iec-5259-data-quality-machine-learning},
  howpublished = {AI Act Change \& Evidence Graph, dataset 2.1.0, schema 1.4.0},
  note         = {effective_at 2026-08-08T00:00:00.000Z; known_at 2026-08-08T00:00:00.000Z; sha256 9fcb6844fee38f7cddc5546b1fc8835cbf284965148c69abc788b201cb2c685e},
  url          = {https://www.praxikon.com/en/verkenner/standard/standard-iso-iec-5259-data-quality-machine-learning},
  urldate      = {2026-08-25},
  language     = {en}
}

CSL JSON

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    "language": "en",
    "issued": {
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    "note": "dataset praxikon:sys:registry:dataset:ai-act-implementation-graph 2.1.0; schema 1.4.0; effective_at 2026-08-08T00:00:00.000Z; known_at 2026-08-08T00:00:00.000Z; sha256 9fcb6844fee38f7cddc5546b1fc8835cbf284965148c69abc788b201cb2c685e; retrieved_from https://www.praxikon.com/api/v1/entities?id=praxikon%3Aeu%3Aai-act%3Astandard%3Astandard-iso-iec-5259-data-quality-machine-learning&effective_at=2026-08-08&known_at=2026-08-08&lang=en; licence https://www.praxikon.com/nl/legal/terms"
  }
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