User:Daniel Mietchen/Talks/JATS-Con 2014/Media types

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OAMI

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Media types

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Media types are used by the OAMI to determine how to process the media files. Wikimedia Commons only accepts audio or video files encoded in open formats Problems with JATS Two attributes: mimetype and mime-subtype. But, sometimes both parts are put into the former, and sometimes they are split. In an example from JATS they are combined as mimetype="application/pdf") The PMC Tagging Guidelines, on the other hand, specify that "<media> also requires @mime-type, and @mime-subtype." Where should the media type go? On <supplementary-material> or on the child <media> or <graphic>? Tagging and delivery problems Openly licensed media by media type Media types misreported by DOI prefix Mismatches between declared type and actual. (See graphic) Often there were differences among all three: publisher XML, PMC XML, and actual Media type. Mismatches between filename extension and media type (see discussion). For example, movie files that end in ".doc". Media types missing altogether. Recent efforts at PMC Until October 2013, PMC was writing @mimetype and @mime-subtype attributes to newly received XML files based on actual filename extensions. Realizing that filename extensions are not reliable, they have stopped. Around the same time, PMC implemented a new feature in its renderer, using libmagic, to accurately determine media type at render time, and use it to set the HTTP "Content-type" header. Also now supports HEAD requests (facilitating easier discovery of media types in bulk) But they will not retroactively fix the values in any source XML. Standardization efforts NISO/NFAIS Supplemental Journal Article Materials Working Group (remember the show of hands in Bruce Rosenblum's talk) This presentation is available under the terms of the Creative Commons CC0 waiver and can be reused by anyone for any purpose.