Closed lidel closed 1 year ago
Submitted initial version, awaiting feedback from IANA:
Media type name: application
Media subtype name: vnd.ipld.dag-cbor
Required parameters: N/A
Optional parameters: N/A
Encoding considerations: binary
Security considerations: The media type inherits the security considerations for <application/cbor> (see Section 10 of RFC 8949) and introduces additional limitations listed at <https://ipld.io/specs/codecs/dag-cbor/spec/>.
DAG-CBOR requires that there exist a single, canonical way of encoding any given set of data, and that encoded forms contain no superfluous data that may be ignored or lost in a round-trip decode/encode.
When used in IPFS context, all processors should rigorously verify data
integrity based on CID links (CBOR Tag 42). Invalid links must be discarded.
Interoperability considerations: DAG-CBOR is a strict subset of <application/cbor> defined by RFC 8949.
Every <application/vnd.ipld.dag-cbor> can be parsed or interpreted as a valid <application/cbor>, but the opposite may not be true.
CBOR tag 42 (registered at https://www.iana.org/assignments/cbor-tags) can be used for indicating CID links to other DAG-CBOR documents, or arbitrary IPFS content.
Published specification: <https://ipld.io/specs/codecs/dag-cbor/spec/>
<https://github.com/ipld/cid-cbor/>
Applications which use this media: DAG-CBOR allows for creating deterministic CBOR documents that produce a stable hash, which in turns allows for use in content-addressed contexts, such as Directed Acyclic Graphs (DAGs) and Merkle tree-like structures based on DAGs.
These properties are used extensively in:
IPLD <https://ipld.io>
IPFS <https://ipfs.tech>
Fragment identifier considerations: N/A
Restrictions on usage: N/A
Provisional registration? (standards tree only): No
Additional information:
1. Deprecated alias names for this type: N/A
2. Magic number(s): N/A
3. File extension(s): cbor
4. Macintosh file type code: N/A
5. Object Identifiers: N/A
General Comments:
Person to contact for further information:
1. Name: Marcin Rataj
2. Email: lidel@protocol.ai
Intended usage: COMMON
N/A
Author/Change controller: Protocol Labs
<https://protocol.ai>
<standards@protocol.ai>
In effort to standardize content type used in https://github.com/ipfs/kubo/issues/8823 and https://github.com/ipfs/kubo/pull/9335 I am submitting a request for registering
application/vnd.ipld.dag-cbor
at https://www.iana.org/assignments/media-types/media-types.xhtml