XML and special characters

i'm using xmlformat command find , eliminate special characters in xml output. (see below.)

<label><![cdata[#xmlformat(coursename)#]]></label>

unfortunately doesn't seem catching hyphen , system i'm importing xml file fails when encounters hyphen between words. there way can account , eliminate hyphens too? thank much.

<label><![cdata[#xmlformat(replace(coursename, "-", " ", "all"))#]]></label>

hope helps, problem may else!
cheers

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