Element: ext:software
One software package on which the supplemental material object was created or which is needed to run or render the object. For example, a PDF file might require a particular version of Acrobat Reader; a spreadsheet might require Excel, OpenOffice Spreadsheet, or other spreadsheet package; a CAD drawing might require a specific CAD-program
Content Model
( ext:software-name, ext:software-version?, ext-link? )