5. IANA Considerations

5.1 Range Unit Registry

The "HTTP Range Unit Registry" defines the namespace for the range unit names and refers to their corresponding specifications. The registry has been created and is now maintained at http://www.iana.org/assignments/http-parameters/.

5.1.1 Procedure

Registration of an HTTP Range Unit MUST include the following fields:

• Name
• Description
• Pointer to specification text

Values to be added to this namespace require IETF Review (see [RFC5226], Section 4.1).

5.1.2 Registrations

The initial range unit registry contains the registrations below:

Range Unit Name	Description	Reference
bytes	a range of octets	Section 2.1
none	reserved as keyword, indicating no ranges are supported	Section 2.3

The change controller is: "IETF ([email protected]) - Internet Engineering Task Force".

5.2 Status Code Registration

The "Hypertext Transfer Protocol (HTTP) Status Code Registry" located at http://www.iana.org/assignments/http-status-codes has been updated to include the registrations below:

Value	Description	Reference
206	Partial Content	Section 4.1
416	Range Not Satisfiable	Section 4.4

5.3 Header Field Registration

HTTP header fields are registered within the "Message Headers" registry maintained at http://www.iana.org/assignments/message-headers/.

This document defines the following HTTP header fields, so their associated registry entries have been updated according to the permanent registrations below (see [BCP90]):

Header Field Name	Protocol	Status	Reference
Accept-Ranges	http	standard	Section 2.3
Content-Range	http	standard	Section 4.2
If-Range	http	standard	Section 3.2
Range	http	standard	Section 3.1

The change controller is: "IETF ([email protected]) - Internet Engineering Task Force".

5.4 Internet Media Type Registration

IANA maintains the registry of Internet media types [BCP13] at http://www.iana.org/assignments/media-types/.

This document serves as the specification for the Internet media type "multipart/byteranges". The following has been registered with IANA.

5.4.1 Internet Media Type multipart/byteranges

• Type name: multipart
• Subtype name: byteranges
• Required parameters: boundary
• Optional parameters: N/A
• Encoding considerations: only "7bit", "8bit", or "binary" are permitted
• Security considerations: see Section 6
• Interoperability considerations: N/A
• Published specification: This specification (see Appendix A).
• Applications that use this media type: HTTP components supporting multiple ranges in a single request.
• Fragment identifier considerations: N/A
• Additional information:
  • Deprecated alias names for this type: N/A
  • Magic number(s): N/A
  • File extension(s): N/A
  • Macintosh file type code(s): N/A
• Person and email address to contact for further information: See Authors' Addresses section.
• Intended usage: COMMON
• Restrictions on usage: N/A
• Author: See Authors' Addresses section.
• Change controller: IESG

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