Error: missing quote mark for attribute value

Hello,

I have an HTML file which contains object parameters containing XML
(example:
<PARAM NAME="Address" VALUE='<address
><info><name>text</name></info><objects type="Location" ><object><index>Idx
20</index></object></objects></address>'>). When I call tidy to convert this
file to XHTML I got the error "missing quote mark for attribute value on the
line containing the XML parameter. I have tried several options, but cannot
get it right. Does anybody know how to handle this?

Regards,
Marco