A concept is identified by an URI. It has different kinds of labels:
represent the main labels of a concept. Only one Pref Label is allowed for each language of a concept.
can be assimilated as synonyms or near-synonyms (abbreviations and acronyms). A concept can have several Alt Labels in the same language.
are used when you would like that characters string to be accessible to AFS-PaF, but would not like that label to be visible otherwise.
are useful to store data regarding the concept, but are not used by AFS.
Concepts can be related to each other through hierarchical relationships: narrower and broader.
Narrower is the child, broader is the parent. A given concept is a kind of its broader. A narrower of a given concept is a specialization of this concept.
Hereafter you can find a very simple vocabulary example, for understanding purposes. This vocabulary is composed of several concepts, related to each other. Concepts are shown only by their Pref Label and in English:
| |-- SUV
| | `-- X-Trail
| `-- Sport Car
| `-- A380
In this example, SUV is a narrower of (a kind of) car. Aircraft is the broader of helicopter.
More details about the concept Truck: Pref Label is Truck. One Alt Label can be Lorry. One Hidden Label can be Van. One definition can be Heavy vehicle.
English: Heavy vehicle
French: Véhicule lourd