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a certain aspect of the wiki (see Figure6.9). e versioning special page makes it
possible to display and restore the history of changes of vocabularies and/or cat-
egories. Furthermore, it is possible to restore the structure of a vocabulary and the
eld information of categories independently on the versioning page by selecting
a vocabulary or category (by clicking on the picture beside the name on the list).
When a vocabulary or category is selected, a pop-up with the detailed version-
ing information is displayed. It is possible to choose between Vocabulary Structure
Changes and Category Changes on the left side. ...