The Common Procurement Vocabulary (CPV) establishes a single classification system for public procurement aimed at standardising the references used by contracting authorities and entities to describe the subject of procurement contracts.
The CPV consists of a main vocabulary for defining the subject of a contract, and a supplementary vocabulary for adding further qualitative information. The main vocabulary is based on a tree structure comprising codes of up to 9 digits (an 8 digit code plus a check digit) associated with a wording that describes the type of supplies, works or services forming the subject of the contract.
The main vocabulary is based on a tree structure comprising codes of up to nine digits associated with a wording that describes the supplies, works or services forming the subject of the contract.
- The first two digits identify the divisions (XX000000-Y);
- The first three digits identify the groups (XXX00000-Y);
- The first four digits identify the classes (XXXX0000-Y);
- The first five digits identify the categories (XXXXX000-Y);
Each of the last three digits gives a greater degree of precision within each category. A ninth digit serves to verify the previous digits.
The supplementary vocabulary may be used to expand the description of the subject of a contract. The items are made up of an alphanumeric code with a corresponding wording allowing further details to be added regarding the specific nature or destination of the goods to be purchased.
The alphanumeric code is made up of:
- a first level comprising a letter corresponding to a section;
- a second level comprising four digits, the first three of which denote a subdivision and the last one being for verification purposes
- CPV 2008. Graph IRI: Graph IRI: http://purl.org/weso/cpv/2008. Total: 556,335
- Scheme: http://purl.org/weso/cpv/2008/scheme
- Dump file (Turtle) (25 MB)
- Division: http://purl.org/weso/cpv/2008/03000000
- Group: http://purl.org/weso/cpv/2008/03100000
- Class: http://purl.org/weso/cpv/2008/03110000
- Category: http://purl.org/weso/cpv/2008/03111000 | http://purl.org/weso/cpv/2008/03111100
- Mapping example:
- CPV 2003. Graph IRI: Graph IRI: http://purl.org/weso/cpv/2003. Total: 191,430
- CPV Definitions. Graph IRI: Graph IRI: http://purl.org/weso/cpv/definitions. Triples: 43
- Dump file (Turtle) (7,4 KB)
The definitions have been made using the vocabularies:
The whole dataset uses links to other datasets (28,839):
- GoodRelations and Product Ontology products and descriptions
In order to create all this data we have used different tools:
- Google Refine and the RDF extension (to produce data)
- Pubby (to publish data)
- OpenLink Virtuoso (to store data)
- José Emilio Labra (Main Researcher of WESO Research Group at the University of Oviedo)
- The first version of the CPV was developed in conjunction with my colleagues of CTIC: Luis Polo and Emilio Rubiera in 2007.
TO DO List
- Check broken links
- Review the design of URIs
- Create Named graphs to group different divisions/groups/classes/categories
- Link to other datasets
- Reconciliate all products and services with the DBPedia resources
- Develop a GUI based on Exhibit, SNORQL, etc.
- Send this dataset and statistics to the Linked Data Cloud
- Update public procurement notices with the new URIs