Thanks for the reply Tom,
I'm using DocBook 4.5 and have been using graphics for the
equations.
This is quick and easy (usually), but doesn't scale real
well. The
higher the resolution of the graphics, the bigger the file.
Since I have
a great deal of these, I lower the resolution as far as I
can get away
with. As a result, they are not really sharp and crisp like
they are
when rendered with MathML in the Jeuclid FOP plugin.
I want the equations to show up in the "equations"
TOC and be numbered
and be able to be referenced, but I also want to treat them
differently
(use graphics) if the output is HTML. Yet I'm unsure of how
to go about
that.
I wonder if the ALT tag could be used to render Mathml?
Regards,
Dean Nelson
Enterprise Electronics Corp
-----Original Message-----
From: tom_schr web.de [mailto:tom_schrweb.de]
Sent: Monday, October 22, 2007 4:25 PM
To: docbook-appslists.oasis-open.org
Subject: Re: [docbook-apps] MathML and graphic images in
single source
Hi Dean,
On Montag, 22. Oktober 2007, Nelson, Dean wrote:
> I would like to have my MathML equations show up in the
PDF and the
> graphic images of the equations show up in the HTML
renderings. Would
> I use the mediaobject or equation or something else?
I am not sure, but if I remember correctly, the stylesheets
copies the
MathML markup directly into the HTML code. However, for the
HTML
stylesheets, there is no automatism that converts MathML
into, say, PNG.
The browser has to support MathML markup.
Back to your question: Both elements should work, actually
it depends on
the title. Generally, an equation has a title that is
numbered. It
appear
also in the list of equations (usually at the beginning of a
book).
Normally, equations are just a wrapper for mediaobject(s).
The element mediaobject holds just the skeleton of the
references to
your
equations, be it for PDF or HTML. Actually it can hold an
arbitrary
number of imageobjects that points to a image source (see
below). It can
contain a caption but that is not numbered and doesn't
appear in the
list
of equations. Just to clarify equation and mediaobject.
> Right now I am using just the equation tag and then
xinclude the
> MathML source. This works well for the PDF but it
doesn't seem to
> validate under Oxygen 8.3 - any clues on that?
Do you use DocBook 4.x or DocBook 5? Either way, if you
xinclude your
MathML source, these elements are unknown in DocBook. You
have to
customize the DTD or the RELAX NG to allow MathML markup
inside
equation.
See http://www.docbook.org/docs/howto/#faq-customization-
mathml for
DocBook5. I have no link ATM for customization for
DocBook4.
> I want to expand the equations to add support for an
HTML viewer that
> does not support the MathML, hence the graphics. Any
help/thoughts
> would be appreciated.
There is also another possibility. You could just omit the
MathML markup
and reference to the rendered graphic(s):
<mediabobject>
<imageobject role="fo">
<!-- For high quality, use a supported
vector format like PDF, EPS, ...
-->
<imagedata fileref="equation.pdf"/>
</imageobject>
<imageobject role="html">
<!-- Any pixel format like JPEG, PNG, GIF, ...
should
work for a browser
-->
<imagedata fileref="equation.png"/>
</imageobject>
</mediaobject>
You have to render your formula with a respective tool
first, that could
be OpenOffice.org or LaTeX. The advantage is you can use the
official
DocBook schema without any customization. The drawback is
it's not
a "direkt" way, you need an additional step.
Hope that helps,
Tom
--
Thomas Schraitle
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