[xsl] replacing a string value

["rick schochler" <ricks@xxxxxxxxxx>]

This may be a simple one, but here it goes...

I have a requirement to replace certain string characters (if encountered)
with a graphic. For example, if the string value of my element foo is a
question mark (i.e, <foo>?</foo>), I need to replace the ? with a graphic.

Any ideas?

Rick


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