This Recommendation is a set of Cable industry registries and namespaces for Names and Numbers. Numerous protocol fields make use of identifiers with well-known names or number values@ for example@ the IETF DHCP protocol and vendor specific option values@ the IETF RADIUS and DIAMETER protocols and associated Cable attributes@ etc. To ensure that such quantities have consistent values and interpretations in different implementations@ their assignment must be administered by a central authority. For IETF protocols@ that role is provided by the Internet Assigned Numbers Authority (IANA). For vendor-specific protocol fields that are defined by Cable industry Recommendations and specifications@ or when the use of such protocol identifiers may be common to multiple Cable industry projects and specifications@ that role is provided by CableLabs.This Recommendation is a common repository that holds these values. This Recommendation uses some of the terminology and guidelines of [IETF RFC 2434]. The scope of this version of this Recommendation includes: ? A DHCP registry for protocol fields authoritatively assigned by CableLabs that are in use in eDOCSIS@ DOCSIS@ IPCable2Home@ and IPCablecom@ for both IPv4 and DHCPv6. ? An XML registry for XML namespaces for DOCSIS and IPCablecom. ? A DIAMETER registry for IPCablecom. ? A Receive Channel Profile (RCP) registry for CableLabs-defined Standard-RCPs and Vendor-defined Manufacturer-RCPs that are used in DOCSIS 3.0 and beyond to communicate the receiver capabilities of a cable modem. NOTE ?C The structure and content of this Recommendation have been organized for ease of use by those familiar with the original source material; as such@ the usual style of ITU-T recommendations has not been applied.