An [h1016(undefined)](https://n2t.net/99152/h1016) that is available and managed over time; it will not change if the item is moved or renamed. This means that an item can be reliably referenced for f
uture access by humans and software (from http://n2t.net/ezid/home/understanding, as reported in http://www.force11.org/node/4770).
An Internet-based [identifier](https://n2t.net/ark:/99152/h1031), such as a URL, that is meant to be valid for long term reference. Persistence of an identifier is purely a matter of service and is ne
ither inherent in an object nor conferred on it by a particular naming syntax.