doc: add sid reserved range reference

Signed-off-by: jason taylor <jtfas90@gmail.com>

diff --git a/doc/userguide/rules/meta.rst b/doc/userguide/rules/meta.rst
index f8593a001a09fb8b958549648cfa039f27c9e57c..1985614baae58e343a6cb882d152e5b9bd79bd84 100644 (file)
--- a/doc/userguide/rules/meta.rst
+++ b/doc/userguide/rules/meta.rst
@@ -50,6 +50,8 @@ Example of sid in a signature:
 
    It is convention that the signature ``sid`` is provided as the last keyword (or second-to-last if there is a ``rev``) of the signature.
 
+   There are reserved ranges of sids recorded here, https://sidallocation.org/
+
 rev (revision)
 --------------
 The sid keyword is almost every time accompanied by rev. Rev