The ProcessingInstructionData(xmlTree) command returns the data contained in the processing instruction xmlTree. If xmlTree is not an XML processing instruction data structure, an error is returned.

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

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

$''version=1.0''$