From e101cf2aaba4f5220cb0db3517b42a55006421cc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Patrick=20L=C3=BChne?= <patrick-github@luehne.de>
Date: Sun, 14 Aug 2016 15:49:34 +0200
Subject: [PATCH] Documented action costs.

---
 doc/output-format.md | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/doc/output-format.md b/doc/output-format.md
index 95b78fc..8a25b83 100644
--- a/doc/output-format.md
+++ b/doc/output-format.md
@@ -107,6 +107,9 @@ postcondition(<action>, effect(<number>), <variable>, <value>).
 
 % defines the condition of a conditional effect
 precondition(effect(<number>), <variable>, <value>).
+
+% specifies the costs of applying <action>
+costs(<action>, <number>).
 ```
 
 Actions may require certain variables to have specific values in order to be executed.
@@ -120,6 +123,8 @@ Unconditional effects are identified with `effect(unconditional)`.
 
 Conditional effects are currently only supported with SAS input problems.
 
+Actions may also have costs required to apply them. Action costs are currently supported for SAS only.
+
 ### Constants/Objects
 
 ```prolog