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In addition to hypertext and its relationships, each entity can have more material (textual/graphic) associated in a Scrapbook. This material can be easily accessed through the use of Bookmarks
List
It is similar to the Browser, but in this case the classes are in a configurable, uncategorized list. There is a global List and you can also create as many Lists as you wish to analyze particular sets of concepts.
A particular example of a List is the list of Authors referenced in the hypertext, dynamically constructed from Labels in it.