The BC2 preserved the general structure of BC1 .
The revised edition ( BC2 ) is to all intents and purposes a new scheme of classification , realising the hopes of the Classification Research Group for the development of a new British scheme of classification .
The BC2 preserved the general structure of BC1 , but the revised edition ( BC2 ) is to all intents and purposes a new scheme of classification , realising the hopes of the Classification Research Group for the development of a new British scheme of classification .