"details" to get string attribute into uvquickshade

say i have a primitive attrib with a texture path in it... But i want a uvquickshade to use this string value..
the easiest way I've found to get to it, is promoting it first to a detail attribute, then in the uvquickshade param box put this in -

 `details("../attribpromote1/", "texturePath")`

where attribpromote1 is the node before the uvquickshade... and texturePath is the string attribute name.