[NTG-context] mathvariant bold NOT bold-italic

Hi, as far as I have understood MathML, elements tagged with mathvariant=bold should be set upright bold, not bold-italic. Could this be corrected, please? Thank you very much! Steffen ------- \usemodule[mathml] \starttext \placeformula\startformula[9pt] \setbuffer http://www.w3.org/1998/Math/MathML"> <msup xmlns="http://www.w3.org/1998/Math/MathML"> <mrow> <mi mathvariant="bold">p</mi> </mrow> <mrow> <mi mathvariant="bold">T</mi> </mrow> </msup> \endbuffer{\processxmlbuffer} \stopformula