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The eduPersonEntitlement attribute contains a set of URNs, each can be thought to represent a 'right' or 'membership'. Lobber expects the eduPersonEntitlement values to be unique within the scope of the identity providers trusted by Lobber to provide this attribute.
The Lobber only web application essentially stores a single object: a Torrent which represents metadata about a dataset. Each time a user uploads data to Lobber a Torrent object is created. Should the same dataset be uploaded twice, two separate Torrent objects are created. This means that if two users upload the same file (the same in the sense that their Torrent infohash are identical), two Torrent files are nevertheless created. Only when the last Torrent object referring to a dataset is removed will the actual datasets be purged from storage nodes holding it.
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