-`display_name`: an alternative, bigger name with richer characters than `name`. `name` should always be set regardless of the presence of `display_name` in the metadata.
-`{<relay-url>: {"read": <true|false>, "write": <true|false>}, ...}`: an object of relays used by a user to read/write. [NIP-65](65.md) should be used instead.
These tags may be present in multiple event kinds. Whenever a different meaning is not specified by some more specific NIP, they have the following meanings:
-`r`: a web URL the event is referring to in some way.
-`i`: an external id the event is referring to in some way - see [NIP-73](73.md).
-`title`: name of [NIP-51](51.md) sets, [NIP-52](52.md) calendar event, [NIP-53](53.md) live event or [NIP-99](99.md) listing.
-`t`: a hashtag. The value MUST be a lowercase string. For kind 1 and other text notes, the event's content SHOULD contain the value prefixed by a `#` within the text in any case.