The current value of the attribute, as a read-only text format.
For choice attributes, this will be a comma-separated list of the selected choice names.
For person-type custom attributes, this will be the name of the selected person.
For location-type custom attributes, this will be the name of the selected location.
For location and room-type custom attributes, this will be the names of both the selected location and the selected room, separated by a hyphen.