References

For Myfiles, references are used to indicate a relationship between a Myfile or its owner and an outside entity or identifier. The following are the standard reference fields. They go alongside the fields listed in the Fields page. All fields are optional and are strings unless otherwise noted.

(Formatted as fieldname: Source or relationship type)

ap:actor: ActivityPub
The URL to an ActivityPub actor. This is what you append "/outbox" to, for example, to get posts. This allows software to look up an actor via the address here, allowing users of that software to use a Myfile address as a mention. This is also used to look up posts for a user.
ap:announcement: ActivityPub
The URL to an ActivityPub post (say, a root post of a thread or latest announcement). This tells viewers what post to prioritize loading and showing above any others. The post does not have to be on the ap:actor account.
email: E-mail
An email address corresponding to the Myfile.
phone: Telephony
The Myfile's phone number. You can use this to call the user, etc.
fax: Telephony
The Myfile's fax number. You can use this to fax the user, etc.
ip4: Internet
The Myfile's IPv4 address. You can use this to access a server, etc. This is not recommended for use as it does reveal the location of the Myfile correspondent in a way that may not be intended.
ip6: Internet
The Myfile's IPv6 address.
website: Internet
This is the closest thing to a Link that is still a Reference. It refers to the Myfile owner's website.
io.keybase.acct: Keybase
This corresponds to a Keybase username. You can input a verification in another field.
location:latlong: Physical location
This corresponds to a location indicated by latitude and longitude. They are separated by a space.
location:pluscode: Physical location
This corresponds to a location indicated by a Pluscode.

location:what3words and location:whatthreewords are also accepted in place of location:w3w.

location:w3w: Physical location
This corresponds to a location indicated by a What3Words address.
org.openstreetmap.id: Physical location via OpenStreetMap
This corresponds to an OpenStreetMap item accessible from openstreetmap.org. This can then be used to get a location.