XML/XQuery/processing instructions

Processing instruction constructors

   <source lang="xml">

File: Data.xml

File: Query.xquery

{ <?doc-processor version="4.3"?>, processing-instruction doc-processor2 {"version="4.3""}, processing-instruction {concat("doc-processor", "3")} {concat("version="", "4.3", """)} }

Output: <?xml version="1.0" encoding="UTF-8"?>

<?doc-processor version="4.3"?><?doc-processor2 version="4.3"?><?doc-processor3 version="4.3"?>

</source>