...a cow is a cow...

It may be seen in various ontologies and datasets as a meat production thing, a milk production thing, or a disease-bearing thing, but it's still a cow. If those food, agriculture or animal health ontologies were all to refer to the cow URI in GACS, it would be easy and useful to link them, even if they are not exactly the same in all respects.



GACS is conceptualized as a space to share common vocabularies. It contains concept URIs that can be the reference point for identical concepts used in distributed KOS like thesauri, taxonomies or ontologies. 

The GACS concept is explained in the Position Paper, which was presented at the GACS workshop at RDA 2018.


At the moment GACS contains two schemes

GACS provides identities

GACS commits to maintain persistent dereferencable Unique Resources Identifiers on the long-term so that they can be used as references by the agriculture and food community. 

With this commitment, GACS is the first step toward a mapping of the data through a community of interconnected, interoperable, semantic assets and services relevant to agriculture and food security. In that sense, it is a pillar of the Agrisemantics ecosystem. GACS will contribute to transform massive data silos to a more reusable web of data and services.

GACS provides key terminology in many languages

As a SKOS scheme, the first bublished GACS  scheme provides easily actionable terminologies in many fields of the agriculture and food domains. Descriptors and their synonyms are available in no less than 28 languages as shown below. And this is just a start


Alternate structures allow to produce different views of the scheme: light hierarchies, thematic groups and ontological types. 

GACS helps data and information managers, application developers & ontologists in the public and private sectors who want to:

  • make their data, semantic resources and systems interoperable with others through concept alignments (or mappings)
  • rely on trusted curated lists of concepts and terms on a given topic to build new resources and systems

Discover GACS