Here is a list of all namespaces with brief descriptions:

[detail level 123]

Nclang	Clang forward declarations
Nhcode2verilog
Nhnode
▼Nparselib
Ncompound
Ngrammar
Nprimitives
▼Ntransforms
Nalias_translation
Ncomma_transformation
Nfunction_info_pass
Nfunction_param_marker
Nfunction_transformation_pass
Nhelpers
Ninterface_generation
Nliteral_expansion
Nname_stub
Nnode
Nnode_merge
Nnode_movement
Npasses
Nport_expansion
Nportbinding_recollect
Nreorder_mod_init_block
Nsensevar_movement
Nslice_merge
Nsort_var_decl
Nstructure_collector
Ntop_down
Ntype_collector
Ntype_node
Ntypedef_expansion
Ntypedef_filter
Nverilog_tranlation
Nutils
▼Nsc_ast_matchers
▼Nutils
Narray_type
Nsystemc	-clang
Nsystemc-clang
▼Nsystemc_clang
▼Nutils
Napint
Nsystemc_hdl