Construct an XML processing instruction.
An XmlProcessingInstruction directly constructs an XML
processing instruction. It is delimited by "<?"
and "?>" and contains a processing instruction
target which is an XML name minus the letter sequence
"XML" (regardless of case), see also the W3C
specification of PITarget.
The PITarget must directly follow the opening delimiter
"<?".
This example constructs a processing instruction intended to be interpreted by the application myapp:
<?myapp rewrite="yes" ?>
The following construct(s) refer to this construct:
