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Subversion-Projektarchive haben eine mit ihnen verknüpfte, universelle, eindeutige Identifizierung (universally unique identifier, UUID). Dieser UUID wird von Subversion-Clients verwendet, um die Identität eines Projektarchivs zu verifizieren, falls andere Methoden nicht ausreichend sind (wie die Überprüfung des Projektarchiv-URLs, der sich im Lauf der Zeit ändern kann).
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As a general rule, you want the UUIDs of your live repositories to be unique. That is, after all, the point of having UUIDs. But there are times when you want the repository UUIDs of two repositories to be exactly the same. For example, if you make a copy of a repository for backup purposes, you want the backup to be a perfect replica of the original so that, in the event that you have to restore that backup and replace the live repository, users don't suddenly see what looks like a different repository. When dumping and loading repository history (as described earlier in the section called “Migrating Repository Data Elsewhere”), you get to decide whether to apply the UUID encapsulated in the data dump stream to the repository in which you are loading the data. The particular circumstance will dictate the correct behavior.
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