half-duplexes (Request/Reply MEPs), 64–66
channels and channel shape, 163, 166, 169–172
as default MEP, 242
handlers of messages. See intermediaries
header, message, 27, 135–148
contents of, 35–40
dependencies, 44
EndpointAddress type, 78, 89, 135, 139, 145–148
MessageHeader type, 135–140
MessageHeaders type, 140–145
standardizing, 39–40
WS-Addressing standard headers, 42–43
Headers property (Message type), 139, 140
hexBinary data type, 29
HTTP and datagram MEPs, 64