> FWIW, I think that, if we are going to start banning proprietary > formats, it makes lots more sense to ban _all_ proprietary formats, > not just picking and choosing among proprietary formats that are, > e.g., more recent or less frequently reverse-engineered than others. > So, yes, let's ban pptx, docx, ppt, doc, non-standardized forms of > PDF, GIF, ... I gather that you consider ECMA-376 and ISO/IEC 29500 formats to be proprietary. On the other hand, the definition of GIF is in a 20 year old document published by a predecessor of AOL, which includes a widely ignored trademark license requirement and an infamous patent. Hmmn. Since apparently some formats specified in ECMA and ISO standards are proprietary, while some that are privately defined and encumbered with trademark and patent restrictions are not, could someone provide a concise description of how I can recognize a non-proprietary format? R's, John PS: I'm not denying that docx and pptx can be unpleasant to deal with, although LibreOffice hides a lot of the unpleasantness. _______________________________________________ Ietf mailing list Ietf@xxxxxxxx https://www.ietf.org/mailman/listinfo/ietf