CIF - Numeric Annotation Glyph
The basis of the standard NAG table is borrowed from the PGN specification. For completeness many additional values will be supported. The C/CIF library provides some functions for the mapping of the NAG values in C/CIF and the NAG values used in Scidb, Scid, ChessBase, ChessPad, and José.
Also a user defined NAG may be given, in this case the NAG value must be greater or equal to 200, but less than 65536.
A note to Rybka Aquarium: Rybka Aquarium might export the NAGs of the predefined phrases as user defined NAGs in C/CIF, and might set the sub-element creator in element extraneous in the game information section to "Rybka Aquarium". In this way every application is able to recognize these phrases. A good source how to interpret these values is the following file from project Scidb: db_pgn_aquarium.h.