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Persistent Uniform Resource Locator

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n. (PURL, abbr.) ~ Computing · 1. A stable Uniform Resource Locator (URL) that provides a redirection to a resource's current URL. - 2. A service that offers such redirection.

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A PURL service provides a means to link a stable URL to a resource, even if the resource's location changes. A PURL service maintains a simple database of PURLs and the associated, current URLs. A PURL published in different places can continue to point to the resource with a single change to the database, rather than having to change all published versions.