The export filter is named "MathML 1.01 (*.mml), but LibreOffice does not use that version. In addition ODF has version MathML 2.0 in its specification and therefore the content.xml of *.odf files is not MathML 1.01 too. Why LibreOffice does not use MathML 1.01: (1) LibreOffice does not write a doctype, therefore the version is not given in the file. (2) LibreOffice writes the attribute "display" into the math-element. That attribute does not exist in MathML 1.01 (3) LibreOffice writes the attribute "xmlns" into the math-element. That attribute does not exist in MathML 1.01 For ODF specification see part 1, section 14.5 "The <math:math> element serves as a container for content defined by the MathML 2.0 standard" http://docs.oasis-open.org/office/v1.2/os/OpenDocument-v1.2-os-part1.html#__RefHeading__1416212_253892949 For doctype of MathML 1.01 see http://www.w3.org/TR/REC-MathML/appendixA.html
Thanks, marking as NEW.
A quick search on Opengrok gave these code pointers: http://opengrok.libreoffice.org/xref/core/filter/source/config/fragments/filters/MathML_XML__Math_.xcu#24 http://opengrok.libreoffice.org/xref/core/filter/source/config/fragments/types/math_MathML_XML_Math.xcu#26
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Takeshi Abe committed a patch related to this issue. It has been pushed to "master": http://cgit.freedesktop.org/libreoffice/core/commit/?id=bcfc60c35e7f7d6436bba0f2554c66bcf699758e tdf#87118 LibreOffice should not claim to use version 1.01 of MathML It will be available in 5.2.0. The patch should be included in the daily builds available at http://dev-builds.libreoffice.org/daily/ in the next 24-48 hours. More information about daily builds can be found at: http://wiki.documentfoundation.org/Testing_Daily_Builds Affected users are encouraged to test the fix and report feedback.
Closing this bug as RESOLVED FIXED