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An ARK is represented by a sequence of characters that contains the label, "ark:".  When embedded in a URL, it is preceded by the protocol  ("http://") and name of a service that provides support for that ARK. That service name, or the "Name Mapping Authority" (NMA), is mutable and replaceable, as neither the web server itself nor the current web protocols are expected to last longer than the identified objects. The immutable, globally unique identifier follows the "ark:" label. This includes a "Name Assigning Authority Number" (NAAN) identifying the naming organization, followed by the name that it assigns to the object. Please visit the NAAN request form if you are interested in generating and using ARKs for your information objects.

Here is a diagrammed example:

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