🧩Application Profile

NEW

Also known as: AP, Profile

A specific set of constraints, extensions, and usage guidelines that tailor a base metadata schema for a particular context.

DESCRIPTION

An application profile customizes a base specification to meet domain or organizational needs. It defines required fields, controlled values, multiplicity, cardinality, and usage notes. Profiles enhance interoperability by making expectations explicit for producers and consumers. SHACL or other validators often encode profile rules. DCAT-AP is a prominent example used by European data portals. Profiles support conformance testing and documentation, helping teams implement consistent metadata across systems.

ALTERNATIVE DEFINITIONS

W3C

A profile is a specification that constrains, extends, or describes a base specification to tailor it to application needs.

Explicitly states constraint and extension of base specifications for reuse.

Source

European Commission

DCAT-AP is a specification based on DCAT for describing public sector datasets in European data portals.

Demonstrates an applied profile deriving from DCAT for a regional context.

Source

RELATED TERMS

DCAT Dublin Core SHACL Profiles Vocabulary Conformance Validation

COMPETING TERMS

Metadata Schema

RELATIONS

• Broader: Metadata Schema
• Derived from: DCAT Dublin Core

KNOWLEDGE AREAS

Semantic & Knowledge Modeling Metadata Management Data Integration & Interoperability

TARGET AUDIENCE

Data Steward Data Architect Information Analyst Data Governance Manager Data Management Consultant

EXTERNAL SOURCES

• Wikipedia - Application profile
• W3C - Profiles vocabulary specification
• European Commission - DCAT-AP profile overview

TOP QUESTIONS

Why use an Application Profile instead of only a base Metadata Schema?

Profiles tailor generic schemas with domain-required fields and constraints, improving interoperability and clarity for a specific context or community.

Category: Relevancy

How is an Application Profile enforced?

Profiles are encoded in machine-readable constraints using SHACL, JSON Schema, or XML Schema, then validated during ingestion or publishing.

Category: Management

What is a well-known Application Profile example?

DCAT-AP, used by European public data portals, extends and constrains DCAT for public sector datasets.

Category: Example

What are common mistakes with Application Profiles?

Over-constraining fields, neglecting versioning, and lacking documentation lead to low adoption and interoperability issues.

Category: Mistakes

How do Application Profiles relate to SHACL?

SHACL shapes express profile constraints on RDF data, enabling consistent validation and conformance checks.

Category: Explanation

What is the risk of not using an Application Profile?

Producers interpret schemas differently, causing inconsistent metadata, interoperability failures, and costly rework.

Category: Risk

How should Application Profiles be governed?

Establish change control, stakeholder reviews, release notes, conformance tests, and training to maintain alignment and trust.

Category: Management

When should you create a new Application Profile?

Create one when a community shares specific needs not covered by the base schema and consensus exists to standardize constraints.

Category: Opinion

Where can I learn about Application Profiles?

Study W3C’s Profiles Vocabulary, DCAT-AP documentation, and examples from open data portals and library metadata communities.

Category: Learning