I have learned how to output images, links, and text with XSLT.
However, when I try to output Google charts, I get errors.
I searched for an answer for a few hours. I want to output this chart, for example:

(I can't even output it as a link.) Also, how can I use XML data to create a chart?
&is one of them. You should encode your URLs. (One way is to use percent encoding en.wikipedia.org/wiki/Percent-encoding.) If it's something outside of a URL, use&(which can also be used in a URL). - Daniel Haley