Re: gradient SVG inside XSL-FO using FOP outputting bl

I'm trying to make a linear gradient using SVG inside XSL-FO. I am using FOP version 0.20.5.

SVG gradients are not supported in FOP 0.20.5. You have to use the
development version of FOP if you want to have this in embedded
SVG, which unfortunately isn't anywhere near a release yet (read:
has deficiencies).
Alternative approaches:
- Render the SVG into a bitmap image (for example using Batik), and
 use the bitmapp image in the FO.
- Render the SVG into a PDF using the Batik PDF transcoder, render
 your FO into PDF using a similar SVG as placeholder, and  merge
 the two PDF using a third party tool.