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? ?? wrote:
 > *****  To join INSNA, visit http://www.sfu.ca/~insna/  *****
 >
 > Dear list members.
 >
 > There is a "line graph" submenu in UCINET's Transform menu. I know
 > "line graph" is constructed by making one line (edge) in input graph
 > to one node in output graph.
 >
 > But, what's the meaning to make line to node? Can we have meaningful
 > anaylsis result?

In the case of hypergraphs, line graphs can have a very direct
interpretation: where hyperedges represent groups, adjacent hyperedges
within the line graph represent groups whose memberships overlap.  This
logic can be taken further by considering edges within the line graph as
(in a certain restricted sense) synonymous with the individuals who form
the intersections between the groups in question.  If this line of
reasoning interests you, Breiger's well-known 1974 Social Forces piece
("The Duality of Persons and Groups") is a good place to start.

Hope that helps,

-Carter

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