The following query returns an XML document node with a child element named 'Customer':
SELECT XMLDOCUMENT(new XML('<Customer/>'));
Query result:
XMLDOCUMENT( NEW XML('<Customer/>') RETURNING SEQUENCE )
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<Customer></Customer>
The following query returns an XML document node with two child elements named 'Name' and 'Address'. This is not a well-formed document according to the XML1.1 specification, but is allowed by the XQuery data model.
SELECT XMLDOCUMENT(XMLQUERY('(<Name/>, <Address/>)') RETURNING CONTENT);
Query result:
XMLDOCUMENT(XMLQUERY('(<Name/>, <Address/>)') RETURNING CONTENT)
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<Name></Name><Address></Address>