Re: [docbook] status of graph2svg

[davep <davep@dpawson.co.uk>]

On 11/12/2011 03:33 PM, Paul Tremblay wrote:
> A while back Dave Pawson posted a question about graph2svg:

> I am wondering about the status and usefulness of the stylesheets. 
> First, the stylesheets require an xsl
> processor, and the only xsl 2 processor is Saxon. However, if you use 
> the latest version of Saxon,
> saxon9he.jar, the stylesheets crash because this processor does not 
> accept built in functions. Instead, one has to download the older 
> version to get the stylesheets to work.
>
> But the documentation for the stylesheets is very sparse. The original 
> is in Russian, a language I don't read. I can't figure out simple 
> things like how to put labels on my x and y axis. Also, the SVG 
> document has no width and height attribute in the root element. So far 
> as I understand, that makes it unusable for FO implementation, or at 
> least FOP processing. FOP requires a height and width attribute. You 
> just can't put these attributes in after the document is generated 
> because it will throw the scale off.

I have used them (as a two part exercise) in a (quite large) docbook 
document.
Put simply they work for me?

Agreed on the documentation... I got out of it what I put into it.

Here, my usage.

<?xml version="1.0" encoding="utf-8"?>
<!DOCTYPE msgr SYSTEM "/sgml/svg/graph2svg/msgr/msgr.dtd">
<msgr  xmlns="http://graph2svg.googlecode.com";

       yAxisType="shifted" xGrid="major"
       yGrid="major" legend="right">
<title>Graph Title</title>

<names>
<name>09-12-01</name>
<name>10-01-05</name>
<name>10-01-12</name>
<name>10-01-16</name>
...
</names>

<values>
<title>axis label </title>
<value>120</value>
<value>124</value>
<value>126</value>
<value>127</value>

...
</values>
</msgr>

In ant I use

<echo>Generate aprilbm.svg</echo>
<call-xslt2
       source="aprilbm.xml"
       output="${local_graphics_src}/graphics/aprilbm.svg"
       stylesheet="${use_xygr2svg_xsl}"
/>

Where the macro is

<macrodef name="call-xslt2" backtrace="true">
<attribute name="source"/>
<attribute name='stylesheet'/>
<attribute name="output"/>
<sequential>
<java classname="${xslt2_processor}"
    fork="yes"
    dir="${basedir}"
    failonerror="true">

<classpath refid="xslt2.processor.classpath" />
<jvmarg 
line="-Dorg.apache.xerces.xni.parser.XMLParserConfiguration=org.apache.xerces.parsers.XIncludeParserConfiguration"/>
<jvmarg 
line="-Djavax.xml.parsers.DocumentBuilderFactory=org.apache.xerces.jaxp.DocumentBuilderFactoryImpl"/>
<jvmarg 
line="-Djavax.xml.parsers.SAXParserFactory=org.apache.xerces.jaxp.SAXParserFactoryImpl"/> 

<arg value="-l"/>
<arg value="-o"/>
<arg value="@{output}"/>
<arg line="-x org.apache.xml.resolver.tools.ResolvingXMLReader"/>
<arg line="-y org.apache.xml.resolver.tools.ResolvingXMLReader"/>
<arg line="-r org.apache.xml.resolver.tools.CatalogResolver "/>
<arg line="${basedir}/@{source} @{stylesheet} " />
</java>
</sequential>
</macrodef>


The max x and y values are based on the data, so shouldn't be a problem, 
though I can't
recall dealing with those? Let me know if it still is.

btw, I have a version of the stylesheets with English comments?

In the xslt 1.0 file I have

<figure xml:id="ch10.fig1">
<title>Plot of  Oct 09</title>
<mediaobject>
<imageobject>
<imagedata fileref="graphics/octbm.svg" format="SVG"
           contentwidth="180mm"/>
</imageobject>
<textobject>
<phrase>title </phrase></textobject>
<caption><para>Plot of  alt text</para></caption>
</mediaobject>
</figure>


Quote, that works for me, ymmv?


HTH


regards

--
Dave Pawson
XSLT XSL-FO FAQ.
http://www.dpawson.co.uk