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Element constructors

An XQuery expression may construct a new XML element: 
<employee empid="12345">
  <name>John Doe</name>
  <job>XML specialist</job>
  <deptno>187</deptno>
  <salary>125000</salary>
</employee>

which just evaluates to itself.

In the XQuery syntax this is unambiguous - XQueryX must use namespaces!

More interestingly, an expression may use values bound to variables: 
<employee empid="{$id}">
  <name>{$name}</name>
  {$job}
  <deptno>{$deptno}</deptno>
  <salary>{$SGMLspecialist+100000}</salary>
</employee>

Here the variables $id, $name, and $job must be bound to appropriate XML fragments or strings.

In general, {...} may contain full XQuery expressions returning sequences.

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