From 15e3d354f56ea0b20ce3ab048c7574eed39b69b4 Mon Sep 17 00:00:00 2001
From: Hans Bolinder <hasse@erlang.org>
Date: Thu, 14 Sep 2017 12:20:47 +0200
Subject: tools: Correction of xref(3)

---
 lib/tools/doc/src/xref.xml | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/lib/tools/doc/src/xref.xml b/lib/tools/doc/src/xref.xml
index 8c49f3a206..11c6fa56f6 100644
--- a/lib/tools/doc/src/xref.xml
+++ b/lib/tools/doc/src/xref.xml
@@ -559,8 +559,10 @@ Two functions (modules,
       analyzing operators:
       </p>
     <list type="bulleted">
-      <item>Expression ::= Expression GraphOp Expression</item>
-      <item>GraphOp ::= <c>components</c> | <c>condensation</c> | <c>of</c></item>
+      <item>Expression ::= Expression BinaryGraphOp Expression</item>
+      <item>Expression ::= UnaryGraphOp Expression</item>
+      <item>UnaryGraphOp ::= <c>components</c> | <c>condensation</c></item>
+      <item>BinaryGraphOp ::= <c>of</c></item>
     </list>
     <p>As was mentioned before, the graph analyses operate on
       the <c>digraph</c> representation of graphs.
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