Definition the term prime name :
Principles employed for cultivar name registration in the database.

1. If several names (synonyms) of one grapevine cultivar are known, it is necessary to define a prime name:

Example: Pinot noir: synonyms are, for instance, Spätburgunder blau, Auvernat etc.

2. The prime name of a grapevine cultivar is always accompanied by the berry colour, using:

Example: Pinot noir N

3. If a prime name is composed out of name of the cultivar plus descriptor, e. g. ripening time, berry colour, they are arranged in the following order:

Example: Pinot precoce noir N

4. The following rules are applied if the prime name of a cultivar consists of the breeders name or location and breeding number:

Example: Kober 5 BB N, Geilweilerhof 1- 23-13 B

5. The prime name is indicated without genera if the species is part of the prime name.

Example: Rupestris du Lot, not: V. rupestris du Lot

6. All language-specific symbols (accent, cedilla, tilde, dieresis) of prime names are omitted.

7. Prime names of cultivars given in Cyrillic letters are transliterated by using rules of Chemical Abstracts.

Example: Magaracha rannii N

8. Tetraploid cultivars are additionally marked (4N)

Example: Chasselas blanc B (4N)

9. If a cultivar is the descendant of different species it is registered as Interspecific crossing in the field Vitis species.

Example:
Seibel 1 N is a cross of Jaeger 70 x Cinsaut and therefore registered as Interspecific crossing in the field Vitis species