Samples for the usage of Mathematical Markup LanguageMathML
in Literature Markup LanguageLML
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General remarks
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The elements eq and beq can be used to contain equations or mathematical
formulas, eq is for simpler inline content, beq for block content.
For simple formulas LML can be used directly, for more advanced structures MathML
should be better applicable and if required it can be simpler copied into other contexts without losing some
information and without further transformations.

Note, that the link element can be used as well to reference or to embed other content into
eq and beq, for example using `XLink:show`="embed"

to embed another document containing maths.

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Simple eq samples
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Simple formulas, equations and expression can be expressed in LML directly:

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Albert Einstein found a relation between energy ~~`E`, mass `m`
and the velocity of light `c`:

`E` = `m` `c`^{2}
The same using MathML:

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Albert Einstein found a relation between energy ~~`E`, mass `m`
and the velocity of light `c`:

$E=m{c}^{2}$
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beq and MathML sample
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MathML can contain some text as well. If the text belongs directly to the mathematical
expression, it is obviously useful to markup this text fragment with MathML as well.
Because the text itself can have some semantical meaning too, the attribute role can be used to provide
this functionality. Authors can optimise this mixture depending on each application.

One general problem can be, that the predefined entities of MathML are ignored.
Authors can look into the MathML recommendation to identify the related unicode as
a replacement. Alternatively the entity definitions can be added to a doctype declaration of the
document.

Sample:

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$\text{Let}\phantom{\rule{0ex}{0ex}}(x\left(t\right),y\left(t\right))\phantom{\rule{0ex}{0ex}}\text{be a path in a plane with the parameter t from 0 to 1, then the path length is:}\phantom{\rule{0ex}{0ex}}L={\int}_{0}^{1}\sqrt{{\left(\frac{\mathrm{dx}}{\mathrm{dt}}\right)}^{2}+{\left(\frac{\mathrm{dy}}{\mathrm{dt}}\right)}^{2}}\mathrm{dt}$
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