Hi Leandro,
DataPower escaping special characters in XML is nothing that should concern you.
Unescaped representation should only be needed for humans, and these should use a XML reader like e.g. a web browser which ensures to render escaped XML characters on presenting to a human, while under the covers ("page source") certain characters might be escaped.
If a receiving application has a challenge with escaped XML characters, than it is not XML-spec compliant and you potentially would need to handle the payload as non-XML... (well, maybe shot to heavy).
So what you can do in DP WSP/MPGW/XMLFW service which expose their XML Manager User is to configure a Compile Options Policy with Minimal Output-Escaping (https://www.ibm.com/support/knowledgecenter/SS9H2Y_7.7.0/com.ibm.dp.doc/faq_characterencoding.html). This can often help achieve your non-XML-spec desire. ;-)
Best Regards,
August
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