From f3ef503bd9f00a52b196121ba1e8e1e4ea220920 Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Fri, 26 Oct 2012 00:30:14 -0400
Subject: Document substvars file in more detail.

---
(limited to 'specs')

diff --git a/specs/spf-2.0/substvars.mdwn b/specs/spf-2.0/substvars.mdwn
index fd4e909..953375c 100644
--- a/specs/spf-2.0/substvars.mdwn
+++ b/specs/spf-2.0/substvars.mdwn
@@ -35,3 +35,14 @@ The following substitution variables shall be set:
     The binary package version, as given in the most recent entry of the change
     log.  See $[sectlink][src-ver] for the syntax of source package version
     identifiers.
+
+
+Defining Substitution Variables [substvars-custom]
+==================================================
+
+Substitution variables may be defined in a file called `substvars`.  See
+$[sectlink][control] for the format of this file.
+
+Names must conform to the requirements outlined in $[sectlink][substvars-name].
+Values may be comprised of multiple lines, and empty lines at the beginning and
+end of each substitution variable value shall be removed.
--
cgit v0.9.1