From: "Anthony J. Bentley" <anthony@anjbe.name>
To: tech@mdocml.bsd.lv
Subject: MathML and <mo>, <mi>, <mn>
Date: Tue, 20 Jun 2017 02:04:29 -0600 [thread overview]
Message-ID: <45090.1497945869@cathet.us> (raw)
Hi,
Consider the quadratic formula:
x={-b +- sqrt{b sup 2 - 4ac}} over 2a
Wikipedia suggests it should be rendered in MathML like so (leaving
out invisible operators):
<mrow>
<mi>x</mi>
<mo>=</mo>
<mfrac>
<mrow>
<mo>−</mo>
<mi>b</mi>
<mo>±</mo>
<msqrt>
<msup>
<mi>b</mi>
<mn>2</mn>
</msup>
<mo>−</mo>
<mn>4</mn>
<mi>a</mi>
<mi>c</mi>
</msqrt>
</mrow>
<mrow>
<mn>2</mn>
<mi>a</mi>
</mrow>
</mfrac>
</mrow>
mandoc -Thtml renders it like so:
<mrow>
<mi>x=</mi>
<mfrac>
<mrow>
<mi>-b</mi>
<mi>±</mi>
<msqrt>
<mrow>
<msup>
<mi>b</mi>
<mi>2</mi>
</msup>
<mi>−</mi>
<mi>4ac</mi>
</mrow>
</msqrt>
</mrow>
<mi>2a</mi>
</mfrac>
</mrow>
A few things are noticeable here:
- mandoc only uses <mi>, not <mo> or <mn>.
- mandoc will transform a '-' into U+2212, but only when it's not
directly adjacent to a digit.
- In Firefox, <mi> only seems to italicize single letters.
It looks like adjacent variables, numbers, and operators should be split:
- 'x=' should become <mi>x</mi><mo>=</mo>
- '-b' should become <mo>−</mo><mi>b</mi>
- '-4ac' should become <mo>−</mo><mn>4</mn><mi>a</mi><mi>c</mi>
The MathML standard says (MathML 3.0 2e # 3.2.33) that "sin" is
appropriately marked up with <mi>. So <mi>sin</mi> should be enough to
correctly render eqn's mathematical words. It seems that for
non-mathematical words to be rendered with italics by default, they
should be rendered with a <mi> per letter?
--
Anthony J. Bentley
--
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next reply other threads:[~2017-06-20 8:04 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-06-20 8:04 Anthony J. Bentley [this message]
2017-06-21 20:59 ` Ingo Schwarze
2017-06-23 2:57 ` Ingo Schwarze
2017-06-23 3:22 ` Anthony J. Bentley
2017-06-23 21:24 ` Ingo Schwarze
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