A UserRecord is the information stored about a registered user of the
Calendar Tool. The Name component is the user`s real-world name. The Id is
the unique identifier by which the user is known to the Calendar Tool. The
EmailAddress is the electronic mail address used by the Calendar Tool to
contact the user when necessary. The PhoneNumber is for information
purposes; it is not used by the Calendar Tool for contacting the user.
A UserRecord is derived from Section 2.6.1.1 of
the requirements, in particular
"../../../requirements/admin.html#Figure%20User%20database%20dialog"> Figure
61.