🗂️DCAT-AP

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Also known as: Data Catalog Vocabulary Application Profile

A European application profile of DCAT for describing public sector datasets and data portals.

DESCRIPTION

DCAT-AP is the European application profile of W3C DCAT that standardizes metadata for datasets published on public data portals. It enables interoperability across catalogs by defining classes, properties, and controlled vocabularies. Implementations facilitate discovery, harvesting, and reuse of open data. DCAT-AP aligns with RDF and SKOS, and is widely adopted by EU institutions and national portals.

ALTERNATIVE DEFINITIONS

European Commission, SEMIC

DCAT-AP is a specification for describing public sector datasets to enable interoperability between data catalogues across Europe.

Highlights interoperability goals for European public data catalogs.

Source

W3C

DCAT is a vocabulary for describing datasets and data services, enabling interoperability between data catalogues published on the Web.

Provides the base vocabulary on which DCAT-AP profiles are built.

Source

Publications Office of the EU

These guidelines support the consistent implementation of DCAT-AP across data portals and catalogues in the EU.

Focus on practical implementation guidance for consistency.

Source

RELATED TERMS

W3C DCAT RDF Simple Knowledge Organization System Data Discovery Platform Open Data Portal Linked Data JSON-LD Metadata Management CKAN

COMPETING TERMS

Project Open Data Metadata Schema Schema.org Dataset

KNOWLEDGE AREAS

Semantic & Knowledge Modeling Metadata Management Data Integration & Interoperability Data Services Data Management

TARGET AUDIENCE

Data Steward Information Analyst Data Architect Data Governance Manager BI Specialist

EXTERNAL SOURCES

• Wikipedia - DCAT
• European Commission SEMIC - Official DCAT-AP specification
• W3C - DCAT vocabulary standard
• EU Publications Office - DCAT-AP implementation guidelines

TOP QUESTIONS

Why adopt DCAT-AP for a data portal?

It standardizes metadata, enabling catalog interoperability and harvesting across European portals, improving discoverability and reuse.

Category: Relevancy

How does DCAT-AP relate to W3C DCAT?

DCAT-AP profiles DCAT with EU-specific requirements and vocabularies tailored for public sector datasets.

Category: Relation

What is required to implement DCAT-AP?

Map existing metadata to DCAT-AP classes and properties, adopt RDF serialization, and align controlled vocabularies. Provide publishing endpoints.

Category: Requirements

What mistakes occur with DCAT-AP adoption?

Partial mappings, inconsistent vocabularies, missing dataset distributions, and weak documentation limit interoperability and harvesting.

Category: Mistakes

How do DCAT-AP catalogs support harvesting?

Consistent metadata and endpoints allow aggregators to ingest datasets automatically, enabling cross-portal search.

Category: Management

What alternatives compete with DCAT-AP?

Project Open Data schema and Schema.org/Dataset are alternatives, especially in non-EU contexts.

Category: Alternatives

How do controlled vocabularies fit into DCAT-AP?

SKOS vocabularies standardize themes, licenses, and spatial terms, improving semantic interoperability.

Category: Relation

Where to start with DCAT-AP?

Review the EC specification, W3C DCAT, and EU implementation guidelines. Pilot mappings with small catalog sections.

Category: Learning

Is DCAT-AP only for public portals?

It targets public sector portals but can be applied in internal catalogs seeking interoperable metadata.

Category: Opinion