Fourth, is the independence of a document from proprietary or commercial hardware and
software configurations, especially to prevent any issues resulting from different versions of
software, hardware, and operating systems. This aspect is expressed in the appendix as open
standards, open source software or equivalent, standard/proprietary, etc. This also closely relates
to independence, one of the five categories in the appendix, expressed as device independencies,
independent implementations, no external dependency, no external dependencies, portability, and
monitoring obsolescence. Having documents in a proprietary format controlled by a third party