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-rw-r--r--doc/manual/expressions/builtins.xml8
1 files changed, 8 insertions, 0 deletions
diff --git a/doc/manual/expressions/builtins.xml b/doc/manual/expressions/builtins.xml
index cefc8b78eebe..0fb5261b384c 100644
--- a/doc/manual/expressions/builtins.xml
+++ b/doc/manual/expressions/builtins.xml
@@ -861,6 +861,14 @@ x: x + 456</programlisting>
 
   </varlistentry>
 
+  <varlistentry><term><function>builtins.isPath</function>
+  <replaceable>e</replaceable></term>
+
+    <listitem><para>Return <literal>true</literal> if
+    <replaceable>e</replaceable> evaluates to a path, and
+    <literal>false</literal> otherwise.</para></listitem>
+
+  </varlistentry>
 
   <varlistentry xml:id='builtin-isNull'>
     <term><function>isNull</function>