In certain protocols that make use of Data Forms (XEP-0004) [1], it can be helpful to include XML-data (for example, when we want to insert a big amount of structured data which is hard to insert as a separate fields). This document defines a method for including XML-data in a data form.
The root element for XML-data is <wrapper/>. This element MUST be qualified by the "urn:xmpp:xml-element" namespace. The <wrapper/> element MUST be contained within a <field/> element qualified by the 'jabber:x:data' namespace.
The <wrapper/> element SHOULD contain an XML-data which needs to be represented in a form.
<wrapper xmlns='urn:xmpp:xml-element'>
<feed xmlns='http://www.w3.org/2005/Atom'>
<title>Romeo&apos;s Microblog</title>
<id>tag:montague.lit,2008:home</id>
<updated>2008-05-08T18:30:02Z</updated>
<author>
<name>Romeo Montague</name>
<uri>xmpp:romeo@montague.lit</uri>
</author>
</feed>
</wrapper>
<x xmlns='jabber:x:data' type='form'>
[ ... ]
<field var='xml-metadata' type='hidden'>
<wrapper xmlns='urn:xmpp:xml-element'>
<feed xmlns='http://www.w3.org/2005/Atom'>
<title>Romeo&apos;s Microblog</title>
<id>tag:montague.lit,2008:home</id>
<updated>2008-05-08T18:30:02Z</updated>
<author>
<name>Romeo Montague</name>
<uri>xmpp:romeo@montague.lit</uri>
</author>
</feed>
</wrapper>
</field>
[ ... ]
</x>
XML-data is usually hard for manual editing and SHOULD be used only for machine level iteractions. So it's RECOMMENDED to include it in the form as a "hidden" field.
However, there are situations when human editing of XML-data may be useful (for example, to see XML-logs of some XMPP-service). In that case it's RECOMMENDED for a client to represent this XML in a pretty formatted form and give an instruments to make it easier to edit XML-data.
This document requires no interaction with the Internet Assigned Numbers Authority (IANA) [2].
The XMPP Registrar [3] includes "urn:xmpp:xml-element" in its registry of protocol namespaces (see <https://xmpp.org/registrar/namespaces.html>).
<?xml version='1.0' encoding='UTF-8'?>
<xs:schema
xmlns:xs='http://www.w3.org/2001/XMLSchema'
targetNamespace='urn:xmpp:xml-element'
xmlns='urn:xmpp:xml-element'
elementFormDefault='qualified'>
<xs:annotation>
<xs:documentation>
The protocol documented by this schema is defined in
XEP-XXXX: http://www.xmpp.org/extensions/xep-xxxx.html
</xs:documentation>
</xs:annotation>
<xs:element name='wrapper'>
<xs:complexType>
<xs:sequence>
<xs:any minOccurs='0' maxOccurs='unbounded'/>
</xs:sequence>
</xs:complexType>
</xs:element>
</xs:schema>
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The following requirements keywords as used in this document are to be interpreted as described in RFC 2119: "MUST", "SHALL", "REQUIRED"; "MUST NOT", "SHALL NOT"; "SHOULD", "RECOMMENDED"; "SHOULD NOT", "NOT RECOMMENDED"; "MAY", "OPTIONAL".
1. XEP-0004: Data Forms <https://xmpp.org/extensions/xep-0004.html>.
2. The Internet Assigned Numbers Authority (IANA) is the central coordinator for the assignment of unique parameter values for Internet protocols, such as port numbers and URI schemes. For further information, see <http://www.iana.org/>.
3. The XMPP Registrar maintains a list of reserved protocol namespaces as well as registries of parameters used in the context of XMPP extension protocols approved by the XMPP Standards Foundation. For further information, see <https://xmpp.org/registrar/>.
Note: Older versions of this specification might be available at http://xmpp.org/extensions/attic/
Fix shortname and section heading to avoid collision with XEP-0221
Initial published version approved for publication by the XMPP Council.
Root element name changed to "wrapper"; xmlns fixed in the XML-schema.
Initial version.
END