[Zope] what's the difference between metal:block and tal:block?

Gerry Kirk gerry@dioceseonline.com
Wed, 18 Jun 2003 14:24:37 -0400

I'm not understanding when to use either. I sometimes see a tal:block 
nested in a metal:block, and sometimes the either way, or sometimes just 
one of the two.

What's the difference between them?