[NTG-context] how to include an an svg file?

hi all. when i want to put some SVGs in my document the svg does not render properly here is the code: \starttext \startMPcode draw lmt_svg [ filename = "smile.svg"] \stopMPcode \stoptext also when i look at evenmore manual at page15, for font Abelone-FREE the gradients has rendered properly is there difference between rendering such fonts and rendering SVGs? if its a font feature how i can use this font features for my svg?