The URL to be hyperlinked to by the HTTP link. It may be set to define a custom link. Note that when read, this always reflects what the server would use. As such, if the status of this link is defaultOn, it will not return your custom URL if read even though it has been stored. Setting the status for this link to customOn will activate your custom link URL. Remember that setting the status of this link to eraseCustom or useDefault clears this variable.