Items belong to a primary category. A line indicates another category label that the item is tagged with.
 Users specify a primary category and tags for each item. Tags can be both other category names or other subtopics of interest.
 Items can be viewed as a list under each category, like in conventional folder structures.
 Users can insert tags into the network map and see items that have them.
 Items can then be dragged closer to the tags of interest as a way of compiling research precedents falling under different topics.
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