X-Git-Url: http://matita.cs.unibo.it/gitweb/?a=blobdiff_plain;f=matita%2Fcomponents%2Fng_kernel%2FnReference.mli;h=4c3dd3416d596cb2b9d53f2a6e2ccf9f0ebb3fd5;hb=243d091f23f8338e155cdde14969a6043b8c89af;hp=d7f87e57c1712e63cba89dd1ea29d49d00893c14;hpb=2c01ff6094173915e7023076ea48b5804dca7778;p=helm.git

diff --git a/matita/components/ng_kernel/nReference.mli b/matita/components/ng_kernel/nReference.mli
index d7f87e57c..4c3dd3416 100644
--- a/matita/components/ng_kernel/nReference.mli
+++ b/matita/components/ng_kernel/nReference.mli
@@ -27,6 +27,7 @@ val reference_of_spec: NUri.uri -> spec -> reference
 
 val eq: reference -> reference -> bool
 val compare: reference -> reference -> int
+val hash: reference -> int
 val string_of_reference: reference -> string 
 val reference_of_string: string -> reference