Путеводитель к информационным узлам и порталам для сельскохозяйственного исследования для развития

RDF store

The RING database is also an accessible RDF store. An RDF store is a way of storing data using a machine-readable "grammar" (the Resource Description Framework) and documented semantics (RDF vocabularies).

1. URIs

On each service page, there is a link to its RDF representation. The RDF vocabulary that has been chosen to describe information services, and especially datasets, is DCAT, which was conceived to describe datasets and the forms in which they are exposed, their "distributions". 
The URI for each primary entity (service/dataset, organization, KOs...) is built as follows: RING-domain/node/service-ID.
The URI for each distribution is built as follows: RING-domain/collection_item/distribution-ID.
The URI for each concept is built as follows: RING-domain/taxonomy_term/service-ID.

For example, the URI of the AgriFeeds service in this RDF store is: http://ring.ciard.net/node/2417 
[This is not final: see note]

Click here for a list of the URIs of all the RING entities (services/datasets, organizations, KOSs etc.)

Click here for a list of the URIs of all RING concepts (countries, topics, regions, protocols etc.)

2. SPARQL endpoint

The whole RDF store is accessible through a SPARQL engine, which means that any system can run remote queries and get the resulting triples.

The endpoint of the SPARQL engine is:
http://ring.ciard.net/sparql1/

 

The vocabularies used in the RDF store are:
RDF: http://www.w3.org/1999/02/22-rdf-syntax-ns#
RDFS: http://www.w3.org/2000/01/rdf-schema#
DC: http://purl.org/dc/terms/ 
SKOS: http://www.w3.org/2004/02/skos/core#
DCAT: http://www.w3.org/ns/dcat#
DCAT-EXT: http://vocabularies.aginfra.eu/dcatext# 
ADMS: http://www.w3.org/ns/adms#
DOAP: http://usefulinc.com/ns/doap#
FOAF: http://xmlns.com/foaf/0.1/
VCARD: http://www.w3.org/2006/vcard/ns#
SCHEMA: http://schema.org/
VOID: http://rdfs.org/ns/void# 
WS: http://vocabularies.aginfra.eu/ws#

ADMS / DCAT model

Click on the image to see the official diagram
of the latest version of the DCAT Application Profile

 

On the right you can find some examples of SPARQL queries that you can execute for testing the endpoint: the response is in RDF/XML.


Note: We have recently realized that URIs containing the domain name of an initiative or an institution are not ideal for persistence: we just had to move from the ring.ciard.net domain to the ring.ciard.info domain for administrative reasons and we may lose control of the ciard.net domain in one year. So we decided to gradually move to PURL URIs, either from purl.org or from new initiatives like xmlns.org. RING URIs will become something like http://purl.org/net/ciardring/{resource-type}/{resource-ID} and will resolve to the RDF and HTML versions of the resource at the URL where they are available at that moment. Notice to services using our URIs: there will be a reasonable period of time for the transition from the ciard.net URIs to the PURL URIs and re-direction from the old URIs will be provided for as long as possible.

Last modified: 
18/08/2016
agINFRA The RING is part of the agINFRA project EC 7th framework program INFRA-2011-1.2.2 - Grant agr. no: 283770