Node IPLD specification is incorrect and incomplete

[str4d]

https://atproto.com/specs/repository#mst-structure

atproto-website/content/specs/repository.md

Lines 85 to 92 in 4744a24

	The node IPLD schema fields are:
	- `l` ("left", CID link, optional): link to sub-tree Node on a lower level and with all keys sorting before keys at this node
	- `e` ("entries", array of objects, required): ordered list of TreeEntry objects
	- `p` ("prefixlen", integer, required): count of bytes shared with previous TreeEntry in this Node (if any)
	- `k` ("keysuffix", byte array, required): remainder of key for this TreeEntry, after "prefixlen" have been removed
	- `v` ("value", CID Link, required): link to a sub-tree Node at a lower level which has keys sorting after this TreeEntry's key (to the "right"), but before the next TreeEntry's key in this Node (if any)

The v field is documented as:

• ✅ A CID link.
• ✅ Required.
• ⚠️ A link to a sub-tree Node.

After experimenting with my own repository's CAR, I've concluded that this is most likely an accidental merge of two separate fields:

• v:
  • A CID link.
  • Required.
  • A link to the Lexicon value corresponding to this TreeEntry's key.
• t:
  • A CID link.
  • Optional (CID link || null).
  • A link to a sub-tree Node.