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Wrapping Arbitrary XML within XML

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感动是毒
感动是毒 2021-01-05 07:53

I need to embed arbitrary (syntactically valid) XML documents within a wrapper XML document. The embedded documents are to be regarded as mere text, they do not need to be p

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  • 爱一瞬间的悲伤
    2021-01-05 08:29

    Isn't that what character entities are for?

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  • 自闭症患者
    2021-01-05 08:31

    Consider using XInclude instead of trying to embed an XML document inside another. The XInclude parse="text" attribute will force the XML to be treated as text, not markup.

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  • 傲寒
    2021-01-05 08:33

    When you escape the ending angular bracket of the inner CDATA, most XML parsers will not complain about the well-formedness of your XML. Using this "workaround", you should be able to nest multiple CDATA sections.

    Something like:

    <?xml version="1.0"?>
<SomeData>
<![CDATA[
<SomeMoreData>
<![CDATA[
yeah, this trick rocks! ...
]]&gt;
</SomeMoreData>
]]>
</SomeData>

    Note that the inner CDATA has its ending ">" escaped as &gt;.

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  • 一整个雨季
    2021-01-05 08:39

    You need to properly escape the text. You don't say what language you're using, but generally: you build a DOM, create a Text node that contains your "inner" XML, and then serialize that DOM. The serializer will handle escaping for you.

    The key point here is use a serializer to produce your output. Don't simply write strings, because you're all but guaranteed to produce something that's not well-formed XML.

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  • 心在旅途
    2021-01-05 08:43

    You can do this by simply adding the document (without its <?xml declaration) as a child tom some parent. SOAP is doing this - it has a <Body> element that can contain whatever xml message one wants to send.

    SOAP defines the XSD this way:

    <xs:element name="Body" type="tns:Body" />
  <xs:complexType name="Body">
    <xs:sequence>
      <xs:any namespace="##any" minOccurs="0" 
          maxOccurs="unbounded" processContents="lax" />
    </xs:sequence>
    <xs:anyAttribute namespace="##any" processContents="lax">
    </xs:anyAttribute>
  </xs:complexType>
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  • 遥遥无期
    2021-01-05 08:43

    One easy solution is that you can have adjacent CDATA sections. <![CDATA[A]]><![CDATA[B]]> is the same as <![CDATA[AB]]>. Hence, you can have <![CDATA[]]]]><![CDATA[>]]>, a ]]> close tag split over two CDATA sections.

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