2. The method of claim 1 , the analysis of the first node corresponding to the first user and the plurality of user nodes corresponding to the plurality of second users, respectively, comprises: identifying at least one candidate user node of the plurality of second nodes that each correspond to a concept or a second user; comparing at least one first user attribute of the first node to at least one second user attribute of the at least one candidate user node; and including, in the plurality of user nodes corresponding to the plurality of second users, the at least one candidate user node when the at least one first user attribute matches the at least one second user attribute.
3. The method of claim 2 , wherein the at least one first user attribute of the first node comprises at least one first data field, the at least one second user attribute of the at least one candidate user node comprises at least one second data field, and the at least one first user attribute matches the at least one second user attribute when the at least one first data field matches the at least one second data field.