DDEX does not impose an upper limit.
But senders of messages are advised that recipients databases may well impose a limit and, thus should only send long names and titles if necessary Artificially long titles, including multiple subtitles as part of the
TitleText have been reported – which cause DSPs that target devices with a limited screen size (such as mobile phones) significant problems.
To support such DSPs, labels are encouraged to separate out the
TitleText from any
SubTitle and let the DSP decide on how to assemble the title for its users.
If the label wants to suggest how to combine these into a single string it should add a
DisplayTitle as follows: