Summary: 

The document defines CBOR tags for object identifiers (OIDs).  The document is well written. 

Few minor questions/comments.

Major Issues: None

Minor Issues: None

Nits:

- It would be nice to expand SDNV in section 1.1 instead of Section 2.

- Section 3.2 - Figure 4-MIB relative object identifier in CBOR:

0b010_01001 should be 0b010_00011 ? for major type 2, additional information 3 bytes

- Section 7.1:

 -- In order to mention the registry, maybe smth like 

  to assign the CBOR tags --> to assign in the CBOR tags registry the following tags....

 -- It would be nice to have the table with the same structure as the registry table (add reference column like in Section 7.2), I think template column does not apply here.

- Section 7.2:

-- In order to mention the registry, maybe smth similar as Section 7.1?


Thank you for this document,

Ines.