diff -r 4b5b5415f6d3 -r 66dcab7b1b43 data/dictionary.xml
--- a/data/dictionary.xml	Sat Aug 17 18:34:08 2013 +0200
+++ b/data/dictionary.xml	Sat Aug 17 18:47:39 2013 +0200
@@ -1226,7 +1226,13 @@
 	</concept>
 	<concept>
 		<term abbreviation="PID" completeForm="protocol identifier" language="en"/>
-		<explanation language="en"><text></text></explanation>
+		<explanation language="en">
+			<text>
+				one octet of information which describes the protocol resp. type of telematic device;
+				0 means implicit (plain MOMT messages);
+				other values are described in 3GPP TS 03.40
+			</text>
+		</explanation>
 	</concept>
 	<concept>
 		<term abbreviation="" completeForm="Blue box" language="en"/>