diff -r ec3eea6b2afc -r 13f19fb2587a data/dictionary.xml
--- a/data/dictionary.xml	Mon Aug 12 23:23:52 2013 +0200
+++ b/data/dictionary.xml	Tue Aug 13 13:52:41 2013 +0200
@@ -123,7 +123,7 @@
 				compared to e-mail, IM messages are short (few words, sentence) and the other side is expected (depending on his/her online status) to read and respond it immediately;
 				compared to SMS, IM messages are cheap – typically free of charge;
 				important IM feature is presence – the sender knows current status of the recipient: online, offline, away, busy etc.;
-				IM is rooted in the computer world but nowadays it is often used also on mobile phones as alternative to (expensive) SMS – in such case it is called OTT and requires mobile Internet connectivity;
+				IM is rooted in the computer world but nowadays it is often used also on mobile phones as an alternative to (expensive) SMS – in such case it is called OTT and requires mobile Internet connectivity;
 				IM messages are usually transferred over an TCP/IP protocol – good example is Jabber/XMPP which is free and open protocol for IM and presence based on XML
 			</text>
 		</explanation>
@@ -145,13 +145,32 @@
 	</concept>
 	<concept>
 		<term abbreviation="XMPP" completeForm="extensible messaging and presence protocol" language="en"/>
-		<explanation language="en"><text></text></explanation>
+		<term abbreviation="" completeForm="jabber" language="en"/><!-- original name -->
+		<explanation language="en">
+			<text>
+				a communication protocol for messaging based on XML;
+				used for transferring
+					IM messages,
+					presence information (statuses like: online, busy, away etc.),
+					contact list (called roster here) management,
+					singaling of VoIP and video, file transfers etc.;
+				can be also used as generic messaging protocol for connecting computer systems (not only human-human interaction)
+				or for human-computer interaction (for accessing services like dictionaries, weather forecast or TV guide)
+			</text>
+		</explanation>
 		<tag>computer</tag>
 		<tag>xml</tag>
 		<tag>messaging</tag>
 		<tag>protocol</tag>
 	</concept>
 	<concept>
+		<term abbreviation="" completeForm="roster" language="en"/>
+		<explanation language="en"><text>a contact list; term used by Jabber/XMPP</text>
+		</explanation>
+		<tag>computer</tag>
+		<tag>messaging</tag>
+	</concept>
+	<concept>
 		<term abbreviation="IMAP4" completeForm="Internet message access protocol version 4" language="en"/>
 		<term abbreviation="IMAP" completeForm="Internet message access protocol" language="en"/>
 		<explanation language="en">