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Variables Dictionnary

Overview

The FReSH Metadata Schema defines the structure and constraints of the metadata used by the FReSH metadata catalog.

The schema specifies: - Metadata fields and their semantics,
- Data types and allowed values,
- Cardinality and mandatory/optional constraints.

Dictionnary Structure

The FReSH Metadata Schema is organized into a set of thematic sections.
Each section groups metadata fields that describe a specific aspect of a resource in the FReSH catalog and is documented in a dedicated file.

  • Technical Metadata
    Defines the technical characteristics of the metadata record itself, including identifiers, schema versioning, and machine-readable properties required for processing and validation.

  • Study related information
    Describes the study or resource at a conceptual level, including titles, abstracts, keywords, thematic classifications, and high-level contextual information.

  • Administrative information
    Covers governance and responsibility aspects, such as creators, publishers, contacts, roles, and administrative metadata needed for catalog management.

  • Study methodology
    Documents methodological aspects of the study, including design, methods, instruments, and other information necessary to understand how the data were produced.

  • Data collection and access
    Describes how data were collected, stored, and made available, including access conditions, formats, distributions, and licensing information.

Cardinality

Cardinality is expressed using standard conventions:

  • 1 – exactly one value (mandatory)
  • 0..1 – zero or one value (optional)
  • 0..n – zero or more values (optional)
  • 1..n – one or more values (mandatory)

Data Types

Data types follow commonly adopted definitions (e.g. string, boolean, date, URI) and may reference external standards or controlled vocabularies where appropriate.