With all the old and new front ends we can have in front of a domino database (client, classic web, Xpages, Nomad, Nomad Web, AppDevPack, Volt, KEEP, ...) it would be very usefull to have a special kind of richtext field with a limited but consistent set of features using an identical editor and resulting in the same representation on all platforms.
The internal format maybe a clearly defined subset of HTML or perhaps something like MarkDown. It should allow tables, inline images and attachments. Attached files should not be placed inside the content but displayed as a list next to the field.
At the moment there is no chance to avoid any loss of information or formatting if rich text content has to be edited on different front-ends. To use the full capacity of all that new possibilities there has to be a well designed way of entering and editing rich text content through any kind of front end without the fear of losing any information.
The contents of the field should be accassible using the traditional domino programming languages including function to convert classic rtf into this format and vice-versa, even though it's clear to deal with the current loss of information during that transformation.