CheckSvgContent trigger
The CheckSvgContent
        trigger validates that Scalable Vector Graphics (SVG) images do not contain external links. 
When enabled, this trigger
            runs just before the Release command releases an image. If the image has a mime-type of
                svg, this trigger confirms that the image contains
            a link to an external reference of type //@xlink:href).
            If the image includes an external reference, an error message occurs and the Release
            action does not occur. 
To enable this trigger, add a trigger to the triggers.xml file as described in Enable a trigger. Use the following values:
apply-to
Release
            
class
com.ixiasoft.cms.triggers.CheckSvgContent
                
objtype
image
            
schedule
before
            
Example
<trigger apply-to="Release" class="com.ixiasoft.cms.triggers.CheckSvgContent" name="CheckSVGContent" objtype="image" schedule="before">
</trigger>