EPub Format For Papers in Repositories

"From an interoperability perspective an open standard is preferable. I would suggest that rather than making use of a specific DTD designed for scholarly publishing we should use a well-established and popular existing open format – HTML (in whatever version). If we wish to maximise the take-up of our repositories whilst minimising the effort in processing the files it seems to me that we should explore ways of creating derivative versions from the master source. So rather than uploading a PDF shouldn’t we be uploading the master file and creating a PDF automatically form this resource? ..."