From dcd17c203cbcde19ff026fc05bba7e79350165eb Mon Sep 17 00:00:00 2001
From: P. J. McDermott <pjm@nac.net>
Date: Wed, 24 Oct 2012 18:25:21 -0400
Subject: Document substitution variables.

---
(limited to 'specs/spf-2.0/overview.mdwn')

diff --git a/specs/spf-2.0/overview.mdwn b/specs/spf-2.0/overview.mdwn
index 9dcdda0..d75642c 100644
--- a/specs/spf-2.0/overview.mdwn
+++ b/specs/spf-2.0/overview.mdwn
@@ -59,9 +59,12 @@ tree:
      +- platconf
      |      Optional.
      |      A list of build-time configuration files.
-     \- src/
+     +- src/
+     |      Optional.
+     |      Package sources (for native packages).
+     \- substvars
             Optional.
-            Package sources (for native packages).
+            Definitions of substitution variables.
 
 
 Descriptions of Files [files]
@@ -234,3 +237,12 @@ See $[sectlink][platconf] for the syntax of this file.
 This directory is optional.
 
 This directory contains the source files for native packages.
+
+`substvars` [files-substvars]
+-----------------------------
+
+This file is optional.
+
+This file contains control fields defining substitution variables.  See
+$[sectlink][control] for the syntax of this file and $[sectlink][substvars] for
+more information about substitution variables.
--
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