Purpose
Final draft of DCAT application profile for data portals in Europe (v 0.06) of was put forward and we need to asses it:
- DCAT AP itself
- it's relation to metadate about datasets we proposed for Vynos 2013/165 in Slovakia
Report
DCAT AP
DCAT AP relates to:
- several models:
- Asset Description Metadata Schema (ADMS)
- CERIF for Datasets (C4D)
- CKAN Dataset Schema
- INSPIRE Metadata Specification
- Schema.org
- Statistical Data and Metadata eXchange (SDMX)
- Vocabulary of Interlinked Datasets (VoID)
- several application profiles:
- Austrian Open Government Data Cooperation
- Norma Técnica de Interoperabilidad de Reutilización de recursos de la información (Spain)
- Project Open Data Common Core Metadata Schema (US)
- WMO Core Metadata Profile (World Meteorological Organization)
The basic use case of the specification is a cross-data portal search for data sets, including cross-lingual search. Additionaly, it also covers metadata update propagation from Data Portals to Metadata Brokes (see "User Scenario 7 – Creations, updates, and deletes of catalog entries") and other use cases.
It defines mandatory and optional classes, mandatory and optional relations between them and also controlerd vocabularies.
DCAT
DCAT AP builds on DCAT specification (Data Catalog Vocabulary (DCAT), version 12 March 2013, published by the Government Linked Data Working Group of W3C as a Last Call Working Draft with a deadline for comments of 08 April 2013).
Basic DCAT classes are:
- Catalog
- Catalog record
- Dataset
- Distribution
- Category and category scheme
- Organization/Person
DCAT AP vs. Vynos 2013/165 (draft)
Draft of Vynos 2013/165 proposes following metadata items (see "§ Otvorené údaje", odsek c) - in table compared/linked to items as specified in DCAP AP:
Vynos 2013/165 (draft) | DCAT AP | notes |
---|---|---|
názov datasetu | Dataset dct:description Dataset dct:title Distribution dct:description Distribution dct:title | multiple choices, Vynos should later specify the precise mapping of "nazov": either dct:description or dct:title |
dátum prvého zverejnenia datasetu | Dataset dct:issued Distribution dct:issued | multiple choices, Vynos should later specify the precise mapping DCAT defines the range of entry as rdfs:Literal typed as xsd:date, Vynos does not specify |
dátum zverejnenia aktuálnej verzie datasetu | Dataset dct:modified Distribution dct:modified | DCAT defines the range of entry as rdfs:Literal typed as xsd:date, Vynos does not specify |
jednoznačný identifikátor poskytovateľa datasetu | Dataset dct:publisher | DCAT defines the range of entry as foaf:Agent, Vynos does not specify |
identifikátor datasetu v tvare referencovateľného identifikátora | Dataset dct:identifier | |
informácia o licencii pre použitie datasetu alebo spôsob vysporiadania právnych aspektov prístupu k údajom v datasete a ich používaniu | Distribution dct:license | |
začiatok platnosti datasetu | no direct mapping | optional in Vynos can be defined as dct:modified |
ukončenie platnosti datasetu | no direct mapping | optional in Vynos |
začiatok účinnosti datasetu | no direct mapping | optional in Vynos |
ukončenie účinnosti datasetu | no direct mapping | optional in Vynos |
schému údajov datasetu | no direct mapping | optional in Vynos Dataset dcat:landingPage can be used to point to web page which will then point to dataset schema defiition |
popis typov položiek a podobne | no direct mapping | optional in Vynos Dataset dcat:landingPage can be used to point to web page which will then point to description of dataset records |