The GACS Project Semantics for Open Data

Caterina Caracciolo

FAO

GACS??

= Global Agriculture Concept Scheme

• To make a common repository of terminological and conceptual information in agriculture

• To achieve efficiency of scale by maintaining core concepts in cooperation

How global?

Why should all this be interesting? #1

Vocabularies are used in concrete applications to describe datasets, pieces of data

Why should all this be interesting? #2

Both vocabularies and data can be linked -> more data getting closer to grasp

– E.g. AGROVOC linked to 16, EUROVOC, GEMET, GeoNames, Wikipedia, LCSH, ...

Estimated overlap between AGROVOC, NALT, CABT

Where are we now?

• First prototype, Alpha 1, internal

• Formed by mapping a core of 10,000 concepts from each vocabulary – Info from matched concepts is aggregated – only Only

exact match considered

• Result: ~ 15,000 concepts, ~ 400,000 terms

GACS Demo Alpha

Highlights

• Temporary URIs now

• All RDF-SKOS

• SKOSMOS for visualization

• VocBench for data maintenance

Something to consider...

Different in concept granularity

AGROVOC: [animal oil], [animal fats]

NALT: [animal fats and oils]

Modelling

• Common names and scientific names are different things? Or different names for the same things?

• E.g. Salmo salar, salmo carpio, salmo ferox - salmon

References

• Reports from GACS:

http://aims.fao.org/community/agrovoc/blogs/phase-one-gacs-approved-read-reports

• To follow progress, check out http://aims.fao.org and subscribe to the user communit