Diva Extraction Rules

I would like to use Diva to trace Layout nets and am in need of a
example Rules file that will show me how to do this. If anyone can
offer a starting point that would be great. I'm assuming this is very
similar to what is done for an antenna check, you pick a starting point
and capture all the shapes tied to that net. Ultimatly I would like to
take the resulting net(s) and compare its proximity to other nets
within the same layout.

thanks,

 

drcExtractRules(
well = geomOr("well")
diff = geomOr("diff")
poly = geomOr("poly")
cont = geomOr("cont")
met1 = geomOr("met1")
via1 = geomOr("via1")
met2 = geomOr("met2")

subs = geomNot(well)
gate = geomAnd(diff poly)
diff = geomAndNot(diff poly)

geomConnect(
svia(cont met1 poly diff well subs)
via(via1 met2 met1)
)

; select shapes based on the presence of a shape overlapping
; some met1 shapes in the net or nets of interest
met1_tagged = geomOverlap(met1 ("met1" "tag"))
diff_int = geomNodeRelate(diff met1_tagged)
poly_int = geomNodeRelate(poly met1_tagged)
cont_int = geomNodeRelate(cont met1_tagged)
met1_int = geomNodeRelate(met1 met1_tagged)
via1_int = geomNodeRelate(via1 met1_tagged)
met2_int = geomNodeRelate(met2 met1_tagged)

; or use the net name, but this would be hard coded in the rule
; deck and not as easy to change as a shape
diff_int = geomGetNet(diff "foo")
poly_int = geomGetNet(poly "foo")
cont_int = geomGetNet(cont "foo")
met1_int = geomGetNet(met1 "foo")
via1_int = geomGetNet(via1 "foo")
met2_int = geomGetNet(met2 "foo")

< do something with the selected shapes>
)