MathML in PDF

[Intelligent2013]

From #283 (comment) (@petervwyatt):

Just a comment / FYI: MathML can serve multiple purposes in PDF:

• they may be needed for accessibility (e.g. supporting PDF/UA-1 conformance) - see this LaTeX discussion if you want some actual examples of PDF/UA-1 with MathML (or this different LaTeX discussion for PDF 2.0 and PDF/UA-2).
• standards authors may also want to have the MathML as visible downloadable embedded files / attachments so all(!) users can then "do math stuff" with the semantically rich data.
• reuse of the math (i.e. so that copy'n'paste from PDF back into MS Word, for example, retains all the math-ness and ends up in Word's equation editor) is best when the MathML is associated with the logical structure (but success very much depends on the PDF app being used). You can experiment with the LaTeX examples I referenced above.

Of course, the same embedded file stream data that is the MathML can be reused for all purposes (so only embed once and reference multiple times).