Content as CDATA Section
If the content has DOCTYPE declaration, it must be wrapped in a CDATA section or encoded as Base64. The following is an example of CDATA wrapped content:
...
<w:serviceContent>
<![CDATA[
<!DOCTYPE Pip3A1QuoteRequest SYSTEM "3A1_MS_V02_00_QuoteRequest.dtd">
<Pip3A1QuoteRequest>
...
</Pip3A1QuoteRequest>
]]>
</w:serviceContent>
...