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-rw-r--r--doc/bird.sgml3
1 files changed, 2 insertions, 1 deletions
diff --git a/doc/bird.sgml b/doc/bird.sgml
index 1cb3fc4f..70d970f7 100644
--- a/doc/bird.sgml
+++ b/doc/bird.sgml
@@ -549,7 +549,8 @@ incompatible with each other (that is to prevent you from shooting in the foot).
(using <cf>path &tilde; [= 2 3 5 * =]</cf> syntax). The masks
resemble wildcard patterns as used by UNIX shells. Autonomous
system numbers match themselves, <cf/*/ matches any (even empty)
- sequence of arbitrary AS numbers. For example, if <cf>bgp_path</cf> is 4 3 2 1, then:
+ sequence of arbitrary AS numbers and <cf/?/ matches one arbitrary AS number.
+ For example, if <cf>bgp_path</cf> is 4 3 2 1, then:
<tt>bgp_path &tilde; [= * 4 3 * =]</tt> is true, but
<tt>bgp_path &tilde; [= * 4 5 * =]</tt> is false.
There is also old syntax that uses / .. / instead of [= .. =] and ? instead of *.