Preliminary results obtained by comparing personal annotations on paper with shared annotations made on-line show that only a small fraction of personal annotations are used in initiating and responding to related on-line discussions. The personal annotations that are shared tended to correspond to explicit marginalia; much effort is still put into rendering both the content and anchors of thse annotations intelligible to others.
['Catherine C. Marshall', 'A. J. Bernheim Brush']
From personal to shared annotations