The following is the class hierarchy for the pipenet system:

net_endpt_base --			common base class for network
					endpoints
	pipenet_clts_base --		common base class for CLTS endpoints
					in the pipenet system
		pipenet_clts_recs --	CLTS endpoint and pseudo-connector,
					record-level I/O
	pipenet_cots_base --		common base class for COTS endpoints
					in the pipenet system
		pipenet_cots_recs --	COTS endpoint, record-level I/O
					(not implemented yet)
		pipenet_cots_bytes --	COTS endpoint, byte-level I/O
	pipenet_connector --		standard object to establish and
					accept normal connections

net_dir_base --				common base class for
					network-service directories
	pipenet_dir_base --		common base class for directories
					in the pipenet system
		pipenet_cldir_recs -- 	directory for connection-less,
					record-level I/O (SOCK_DGRAM)
		pipenet_codir_recs --	directory for connection-oriented,
					record-level I/O (SOCK_SEQPACKET)
					(not implemented yet)
		pipenet_codir_bytes --	directory for connection-oriented,
					byte-level I/O (SOCK_STREAM)