Just pushed to github version 10^-1.8 of MD_Extract. Added a construct by URL method.
One clarification, what I meant on the other post by economic efficiency was simply that i have better things to do with my life. Ie: Time is a scarcer resource than CPU cycles. And since I’m doing this just to showcase microdata as a technology (I don’t have an actual need for microdata right now), the approach I’m taking is good enough.