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-rw-r--r--lib/tools/doc/src/xref.xml6
1 files 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.