Never Use Relative Url As Embedded Reference Inside SVG
Don't put relative URL linking to external images inside an SVG. URLs should
always be absolute so the SVG remains portable and always points to the correct
location of the embedded image.
Good Examples:
http://www.erp5.org/user-Reference.Of.My.Screenshot?format=png
Bad Examples:
user-Reference.Of.My.Screenshot?format=png