- The Envelope element is mandatory and is the root element.
- The Envelope element must always be associated with the http://www.w3.org/2001/12/soap-envelope namespaceURI.
- The syntax for namespace is:
xmlns:prefix=”namespaceURI”
where the namespace declaration begins with xmlns. The prefix is any value defined by a user, while the namespaceURI is always http://www.w3.org/2001/12/soap-envelope, as indicated in the code example.
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