Request normal font shift

[opoudjis]

We are using AsciiMath to enter expressions with units, https://github.com/metanorma/bipm-si-brochure/issues/54, and that requires the option of a font shift to normal, upright font.

This is not present in most instances of Asciimath, but as I found in https://github.com/asciidoctor/asciimath/issues/7, https://runarberg.github.io/ascii2mathml/ (now offline) had rm (taken from TeX, although it properly refers to serifed font, not upright style).

The option to force upright font is necessary, we feel, and we request rm as an addition to this gem's Asciimath:

asciimath/lib/asciimath/parser.rb :

b.add('sfbi', :normal, :unary)

asciimath/lib/asciimath/latex.rb :

:normal => "\\mathrm", (or: \\mathup)

asciimath/lib/asciimath/markup.rb :

b.add(:sans_serif_bold_italic, :normal, :font)

[davidfarmer]

Instead of a shift in font, how about a way to indicate that certain characters represent units?

That has the advantage of being semantic. The work to implement it is the same, but the mindset of the person writing the formula is different.

On Mon, 23 Nov 2020, Nick Nicholas wrote:

We are using AsciiMath to enter expressions with units, metanorma/bipm-si-brochure#54, and that requires the option of a font shift to normal, upright font.

This is not present in most instances of Asciimath, but as I found in #7, https://runarberg.github.io/ascii2mathml/ (now offline) had rm (taken from TeX, although it properly refers to serifed font, not upright style).

The option to force upright font is necessary, we feel, and we request rm as an addition to this gem's Asciimath:

asciimath/lib/asciimath/parser.rb :

b.add('sfbi', :normal, :unary)

asciimath/lib/asciimath/latex.rb :

:normal => "\mathrm", (or: \mathup)

asciimath/lib/asciimath/markup.rb :

b.add(:sans_serif_bold_italic, :normal, :font)

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[opoudjis]

We will be doing that in a month or so; but this is a genuine gap in Asciimath coverage anyway, and should be filled whatever we end up doing. if fonts shfits are allowed over non-text, they should not ignore upright/normal font as an option. If it is legal to say ii(xyz), we should also be able to say rm(xyz).

[pepijnve]

@opoudjis I think 685fd2f does what you're asking for. Regarding the original issue, wouldn't using text rather than an identifier, as the poster asked, have worked as well?

[pepijnve]

BTW, I did not change the semantics of sfbi as you suggest in your description. Was that a typo?

[opoudjis]

Yes, typo.

We're trying to generate MathML compatible with the UnitsML proposed spec, which uses MathML <mi mathvariant="normal"> for units. While mtext will work, mi is what we'd prefer to do, and of course either mtext or mi will require the normal font shift anyway. (And yes, in the longer term, we will look at a Units/Asciimath hybrid markup, but we're not there yet.)

And yes, your update is what we were after, thank you!

[opoudjis]

@pepijnve, would it be possible to release asciimath soon? We're about to give a document to an external party using this functionality.

[pepijnve]

Sorry Nick, I kind of forgot about this one. I'll make a new release right away.

[pepijnve]

Fix is in https://rubygems.org/gems/asciimath/versions/2.0.2