To build a thesaurus

The ‘thesaurus’ table and the ‘Concept’ detailled view provide access to thesaurus construction and management functions.

To start a thesaurus

  • Add a top concept

The top concept is tjhe highest concept in the hierarchy to which it belongs. It is represented by a top term. Located at the ‘root’ of the vocabulary, the top concept is an entry point into one of the branches of a thesaurus.

  • Add a narrower concept
  • To import a list of concept

CSV preparation file

The file to be imported must first be structured according to the SKOS classes

See the section on the SKOS datamodel in the ‘Best practices’ article and the section on importing in CSV format in the ‘Import a thesaurus’ article.

100Structures hydrauliques
Constructions hydrauliques##Ouvrages hydrauliques
Hydraulic structures
Aménagements relatifs à la circulation de l’eau.
101Aqueducs AqueductsCanal en maçonnerie, souterrain, à fleur de sol ou aérien, destiné à capter et à conduire l’eau d’un lieu à un autre 100
102Fontaines Fountains
Construction, généralement munie d’un bassin, aménagée pour l’écoulement et la distribution de l’eau.
103Puits Pits
Trou profond, creusé de main d’homme, qui permet de tirer l’eau d’une nappe souterraine.

Multiple values are separated by (##) in the fields that allow them.

If the identifier (URI) already exists in the thesaurus, the concept to be imported will be rejected.

The identifier (URI) is mandatory to express hierarchical relationships with a broader term, whose own identifier must be indicated in the skos:broader column.

– Import process

  It is recommanded to use OpenOfficeCalc or Notepad++ to generate the character encoding in UTF8.

Edit a concept

  • Rename a concept

It is possible to change the preferred term that representes the concept:

  • Delete a concept

Hierarchical relationships

  • Add a broader relationships

Opentheso supports polyhierarchy, whereby a narrower concept can be linked to several broader concepts.

  • Delete a broader relationship
  • Add a narrower relationship with an existing concept
  • Delete a narrower relationship
  • Edit narrower relationships

It is possible to specify the category of hierarchical relationshiops that link concepts: broader relationship (genus-species), partial relationship (all-part) or instance relationship (class-instance).

See the hierarchical relationships and the summary table of relationships in the ‘Good practicies’ article.

Equivalence relationships

  • Add synonyms
  • Edit a synonym
  • Delete a synonym


  • Add annotations

On the different types of annotation, see the summary table of relationship in a thesaurus in the ‘Good practices’ article.

  • Edit a note
  • Delete a note

The images

  • Add an image
  • Edit an image
  • Delete an image

It is also possible to insert images with the alignement features.
See ‘Enriching your data with Wikidata’ in the ‘Consolidating and enriching your data with alignments’ article.

The traductions

  • Add a traduction

For language settings, see ‘Set up a thesaurus’ in the ‘Projects, account and roles’ article.

  • Edit a traduction
  • Delete a traduction
  • Browse into the traductions

Statistics can also be used to monitor the progress of the thesaurus translation.

  • Interface traduction

This feature is under development.

The notations

Notation refers to a code for identifying a concept whithin a classification system. Examples are the Dewey classification system, the Periodic Table of the Elements or the Aarne-Thompson classification of tales.

The chemical symbol ‘O’ is the notation for oxygen:

<skos:preflabel xml:lang=”fr”>Oxygène</skos:preflabel>

The standard tale ‘Cinderella’ has the number 510A in the Aarne-Thompson classification:

<skos:preflabel xml:lang=”fr”>Cendrillon</skos:preflabel>

  • Sorting a thesaurus by notation

Background of a concept

Citer cet article : « To build a thesaurus », par Alyssa Turgis. Publié sur Opentheso le 10/06/2022. Lien :

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