Here is a list of all namespaces with brief descriptions:

Ndataset
Nexport
Nloss
Nmodel
NMoERouting
NMoveGen	Utility wrappers for legal and capture move generation
NMoveOrderConstants	Scores used to sort moves during the move picking phase
NPolyglot
Nprepare_dataset
NSearchConstants	Global constants related to search and evaluation boundaries
NTablebase
NTablebaseFallback
Ntrain
Nutils