Whether the thread is resolved. Setting this to true is equivalent to setting resolvedTimestamp to the current time, and setting this to false is equivalent to setting resolvedTimestamp to null.
The name of the thread. This is shown to users when the thread is referenced, such as in notifications. This should generally be something like the page title.
A URL where the thread can be seen. This determines where a user is sent when they click on a reference to this thread, such as in a notification, or if they click on a reference to a message in the thread and the message doesn't have its own URL.