A Fediverse ID is an identifier that conceptually is usually used to point to a person, but also can be conceptually used to point to an application, a group, a organization, a service, or any other type of entity.
Here are some sample Fediverse IDs:
A Fediverse ID looks similar to an e-mail address.
The main superficial difference being that a Fediverse ID starts with an at sign (“@”) (Unicode character U+0040), but an e-mail address does not.
at sign ↓ @joeblow@example.com ← Fediverse ID joeblow@example.com ← e-mail address ↑ no at sign
Fediverse IDs appear in posts on the Fediverse, and are typed (something with the help of some form of autocomplete) by users.
Part of the process of resolving a Fediverse ID transfomrs a Fediverse ID into an
Here is an example:
at sign ↓ @joeblow@example.com ← Fediverse ID acct:joeblow@example.com ← acct URI ↑ no at sign