No, you cannot ignore the check. Your "xml file" is not an XML file - the ampersand must be escaped for the XML file. Therefore, no software designed to read XML files will parse it without errors. You need to fix the software that generated this file so that it generates the correct ("well-formed") XML. All the benefits of using XML for sharing completely disappear if people start sending things that are poorly formed and people receiving it try to fix it.
Michael kay
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