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3. An approach: guarantee of existence
The approach suggested in this article gives authors the possibility to make reliable statements on the availability of published information. The e-portfolio software basically provides publishers with a kind of commitment option. This option is a guarantee given be the publisher that published information is not deleted until a certain period of time has expired. The metadata of a content object gives information on the author, the copyright owner, the publication date as well as how long the information will be available at the respective internet address which, essentially, needs to stay the same.
Two factors determine whether the concept will work properly: The assigned guarantee needs to be clearly visible. Moreover, the relation between the guarantee and the information needs to be obvious. In addition users need to show confidence in the guarantee. Crucial factors for confidence are the credibility of the organisation or institution responsible as well as a logical, transparent method according to which the guarantee of existence is set.
If credibility and method are accepted by the users, the precondition for reliable availability of information, as mentioned above, is fulfilled. In combination with a precise linking mechanism, it becomes possible to include information reliably into a developing learning environment, which subsequently turns the e-portfolio into a sustainably usable knowledge ressource.
