Jan Hidders writes:

Doesn't the GFDL now already require that you include a URL to Wikipedia if you copy material from it?

I believe this is essentially the only practical way of complying with 4.J and 5.B on the web. You need to inform the reader about a "transparent copy" (= wiki text) and about the "principal authors" (= history of wiki article).

I would be in favor of adding a phrase to [[Wikipedia:copyrights]] saying in effect

"If you use our material, we ask for a conspicuous link back to the original Wikipedia article. If you include such a link, we consider your obligations under 4.J and 5.B GFDL fulfilled."

Axel