The XMLProcessingInstruction(tagName, s) command is the constructor for processing instruction nodes in an XML tree data structure.

The first argument tagName identifies the tag for the processing instruction.

The second argument s specifies the text of the processing instruction. The XML data structure for the XML processing instruction is returned.

$\mathrm{with}\left(\mathrm{XMLTools}\right)\:$

$\mathrm{XMLProcessingInstruction}\left(''xml''\,''version=1.0''\right)$

$\mathrm{\_XML\_ProcessingInstruction}\left(''xml''\,''version=1.0''\right)$