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Lecture Notes in Computer Science
Cancelling or reversing the effect of a former action is a necessity in most interactive systems. The simplest and most frequent form of this facility is the "undo" command that is available in usual, individual, text or graphic editors. As soon as collaborative work is considered, undoing is more intricate since the notion of a last action is not always meaningful. Within this framework, the so-called "selective undo", which allows selecting and cancelling any (or rather some...) formerdoi:10.1007/11556169_3 fatcat:vctpgrozunes3pcxf73beclnby