newbie question: nested tags

I'm trying to use the value-of as an attribute for an HTML tag.  Example:

<a href="<xsl:value-of select="url"/>">link</a>

There must be a way to do this, but I'm not seeing it... short of using a
CDATA section for the markup surrounding the select, but that seems like a
terrible hack.

Can anyone help me?  Thanks...

-jmc

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