From: Robert Miner <RobertM@dessci.com>

Date: Thu, 14 Mar 2002 09:58:18 -0600

Message-Id: <200203141558.JAA24903@wisdom.geomtech.com>

To: amundson@fnal.gov

CC: www-math@w3.org

Date: Thu, 14 Mar 2002 09:58:18 -0600

Message-Id: <200203141558.JAA24903@wisdom.geomtech.com>

To: amundson@fnal.gov

CC: www-math@w3.org

Hi Jim, > I am trying to understand the status of line breaking in MathML. By > "line breaking" I mean the display of mathematical expressions that > would be too wide to fit on a single display line. I cannot find any > reference to this problem in the context of MathML, but perhaps I am > using the wrong terminology. Any enlightenment would be appreciated. > > I realize that the problem of dynamically breaking mathematical > expressions into multiple lines is a difficult problem. As far as I know, there are only two MathML implementations that handle automatic linebreaking: 1) Mathematica -- really robust, really sophisticated linebreaking, but of course you are tied to the Mathematica UI. I believe you can create images (I'm not sure if you can specify a width to wrap to in images, but I expect you can), and there is a webMathematica product that can be used as a server-side back-end to do dynamic processing for Web applications. 2) WebEQ 3 Developers Suite -- reasonably sophisticated, but less robust linebreaking. Three of the tools in the Suite are relevant for linebreaking: * The ViewerControl applet. Requires height and width be specified in applet tags, but will wrap equations to the width. It doesn't currently pop up a scroll bar or anything if the height is not sufficient for the wrapped equation. It just clips. * Publisher. A program for processing a variety of document formats containing math markup into Web pages for ready for publication. It allows a user to set a wrap width for equations, and will either generate images of wrapped equations, or ViewerControl applet tags with the wrap width and sufficient height set. * EquationServer. A batch version of the Publisher suitable for server-side back-end use in Web applications. As far as I know, there are no implementations currently that actually pay attention to the 'overflow' attribute on the <math> tag, though most do pay attention to display=[block|inline]. Finally, for what it is worth, Maple 7 uses a custom version of the ViewerControl applet to display Web page versions of its notebooks, using the automatic linebreaking capabilities. So, it can probably at least get you off the ground with your Maxima project. You can get a 30-day demo of WebEQ from http://www.dessci.com --Robert ------------------------------------------------------------------ Robert Miner RobertM@dessci.com MathML 2.0 Specification Co-editor 651-223-2883 Design Science, Inc. "How Science Communicates" www.dessci.com ------------------------------------------------------------------Received on Thursday, 14 March 2002 10:58:32 UTC

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