20. A computerized knowledge-management system comprising: at least one processor coupled to a computer-readable storage medium, the storage medium including: a first plurality of documents associated with a first user, and a second plurality of documents associated with a second user; an interface unit configured to generate a graphical representation of multiple users including: a first link associated with a first user and a first element vector, and a second link associated with a second user and a second element vector, the first element vector including a first group of elements having at least one attribute from a set of characterization attributes, and the second element vector including a second group of elements having at least one attribute from the set of characterization attributes; and a display coupled to the interface unit, the interface unit configured to present via the display: the first element vector, the second element vector parallel to the first element vector, and the graphical representation of multiple users at a non-zero angle to the first element vector and the second element vector, the graphical representation of multiple users including the first link and the second link.
20. A computerized knowledge-management system comprising: at least one processor coupled to a computer-readable storage medium, the storage medium including: a first plurality of documents associated with a first user, and a second plurality of documents associated with a second user; an interface unit configured to generate a graphical representation of multiple users including: a first link associated with a first user and a first element vector, and a second link associated with a second user and a second element vector, the first element vector including a first group of elements having at least one attribute from a set of characterization attributes, and the second element vector including a second group of elements having at least one attribute from the set of characterization attributes; and a display coupled to the interface unit, the interface unit configured to present via the display: the first element vector, the second element vector parallel to the first element vector, and the graphical representation of multiple users at a non-zero angle to the first element vector and the second element vector, the graphical representation of multiple users including the first link and the second link. 21. The system of claim 20 , wherein the first plurality of documents on the first element vector is associated with a first user characterization attribute and the second plurality of documents on the second element vector is associated with a second user characterization attribute.