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Chapter 4. Namespaces > URIs
URIs
The namespace declaration associates a global naming system (the URIs) to the name of the elements.
The URI is only used to ensure uniqueness of names. It might (but it need not) point to a description of the name. For example, there might be a document at http://penguin.xmli.com/review/1.0 that describes the rating or there might be nothing.
