On Jul 13, 2004, at 12:06 PM, Andrew E Switala wrote:

> The <xsd:any> schema allows for foreign markup, and only the definition
> of<extension> uses it in MODS.

OK, so my hunch was right: my RELAX NG version needs to be fixed!
Thanks for the clarification.

But since I stumbled on this, how about changing the definition of
title and subTitle to allow foreign namespace elements?  Having to
stick redundant information in the extension element is not exactly
ideal, and I do believe there's value in allowing for markup of this
stuff.  An XSLT stylesheet could just ignore the markup.