--- a/relpipe-data/specification.xml	Fri Nov 30 16:57:48 2018 +0100
+++ b/relpipe-data/specification.xml	Fri Nov 30 17:01:07 2018 +0100
@@ -89,6 +89,16 @@
 		
 		
 		<h3>relpipe-in-fstab</h3>
+		
+		<p>
+			A tool that parses <code>fstab</code> (or <code>mtab</code>) file containing a list of devices, mount-points and their options and generates a single relation from it.
+		</p>
+		
+		<p>
+			If executed on TTY, it reads data from the default location: <code>/etc/fstab</code>.
+			If executed with STDIN attached to a file or another command (in a pipe), it reads data from this stream.
+		</p>
+		
 		<h3>relpipe-out-tabular</h3>
 		<h3>relpipe-out-xml</h3>
 		<h3>relpipe-out-qui</h3>