Here are the classes, structs, unions and interfaces with brief descriptions:

[detail level 1234]

Nboat
Ndb
Ckind< T >
Ccatalog	Uniform access to vector and raster data
Ccommand
Csource
Clayer
Ccolumn
Cindex_key
Ctable
Cbbox	Spatial filter for row selection
Corder_key
Cpage	Pagination filter for row selection
Cband
Craster
Crect
Cid
Cquery
Crowset
Cvariant
Ckind	Maps a C++ type to the database-neutral type name used by boat
Ckind< std::string >
Ckind< blob >
Ngdal
Ccatalog
Ccommand
Cdriver
Ngeometry
Cd2
Cgeometry_collection
Ngui
Ncaches
Ccache
Clru
Cprovider
Craster
Nslippy
Ccatalog
Nsql
Nlibmysql
Ccommand
Nlibpq
Ccommand
Nodbc
Ccommand
Nsqlite
Ccommand
Ccatalog	Raster operations throw std::logic_error
Cblob_view
Cblob
Chex	Formats bytes as uppercase hex, two digits per byte
Ctile
Nboost
Ngeometry
Ntraits
Ctag< T >
Nstd
Chash< boat::blob >
Chash< boat::tile >