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The library in which the definitive authorised versions of all software CIs are stored and protected. It is a physical library or storage repository where master copies of software versions are placed. This one logical storage area may, in reality, consist of one or more physical software libraries or filestores. They should be separate from development and test filestore areas. The DSL may also include a physical store to hold master copies of bought-in software, e.g., fireproof safe. Only authorised software should be accepted into the DSL, strictly controlled by Change and Release Management.

ITIL. Glossaries © Crown Copyright Office of Government Commerce. Reproduced with the permission of the Controller of HMSO and the Office of Government Commerce

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