http://franz.com/ns/allegrograph/4.11/sna/actorBetweennessCentrality
Compute Actor Betweenness centrality.
For example:
  (?actor ?centrality) sna:actorBetweennessCentrality ( ex:namedGenerator ?group ) .    will bind  ?centrality  and  ?actor  for each member of  ?group .  As with other SNA magic properties, the centrality computation is based on the generator and assumes that it has already been defined. 
Notes
The following namespace abbreviations are used:
- fti - <http://franz.com/ns/allegrograph/2.2/textindex/>
 - geo - <http://franz.com/ns/allegrograph/3.0/geospatial/>
 - geofn - <http://franz.com/ns/allegrograph/3.0/geospatial/fn/>
 - nd - <http://franz.com/ns/allegrograph/5.0/geo/nd#>
 - ndfn - <http://franz.com/ns/allegrograph/5.0/geo/nd/fn#>
 - sna - <http://franz.com/ns/allegrograph/4.11/sna/>
 
The SPARQL magic properties reference has additional information on using AllegroGraph magic properties and functions.