FOP 0.20.5rc2 - how set base URL ?

> Hi,
> 
> I'm using FOP 0.20.5rc2. When running within Tomcat, I am applying XSL:FO
> against XML.
> But the transformation fails to find the URL for an SVG reference I have.
> 
> The error is:
> [ERROR] Error while creating area : Error with image URL:
> file(historyChart.svg) (The system cannot
> find the file specified) and no base URL is specified
> 
> In XSL, I tried setting url based on absolute path:
> 
>       </fo:block>
>       
>             <fo:block>
>             <!--url(file://historyChart.svg)  -->
>             <!--url(file:///D:/historyChart.svg) -->
>             <!--file:///D:/historyChart.svg -->
>             
>          <fo:external-graphic xmlns:svg="http://www.w3.org/2000/svg"
> src="file(historyChart.svg)"/>
>       </fo:block>
> 
> These don't work.
> 
> I tried getting the base url , but getInstance() does not seem to be
> available (get compile error)
> org.apache.fop.configuration.Configuration.getInstance().getBasePath()
> 
> How do I set the base url ?
> Where is the default base directory?
> 
> Thanks,
> 
> Anthony
> 
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