CFC: null id values in ActivityPub objects

Issue 476 on ActivityPub notes that the null value is not a valid JSON-LD
property value, especially for IDs:

https://github.com/w3c/activitypub/issues/476

To correct this problem, there is a new erratum on the document:

Section 3.1 "Object identifiers", says in part that "identifiers must fall
into one of the following groups: [...] An ID explicitly specified as the
JSON null object, which implies an anonymous object (a part of its parent
context)". However, Activity Streams 2.0 objects must be formatted as
compacted JSON-LD objects, where `null` is not a meaningful property value,
including for `id`. One solution is to simply leave the `id` property
unspecified: *ActivityPub extends this requirement; all objects distributed
by the ActivityPub protocol MUST have unique global identifiers, unless
they are intentionally transient or anonymous, in which case the identifier
MAY be omitted. If present, the identifiers MUST be publicly dereferencable
URIs, such as HTTPS URIs, with their authority belonging to that of their
originating server. (Publicly facing content SHOULD use HTTPS URIs).*


This is a call for consensus on adding this erratum. If there are no
objections by 12 Dec 2025 anywhere on earth end of day, I will add this
erratum to the errata for ActivityPub and apply the change to the editor's
draft.

To object, reply to this thread or comment on GitHub.

Thanks,

Evan