1.1 --- a/data/dictionary.xml	Sun Aug 11 13:42:41 2013 +0200
     1.2 +++ b/data/dictionary.xml	Sun Aug 11 15:48:08 2013 +0200
     1.3 @@ -43,6 +43,7 @@
     1.4  		<term abbreviation="" completeForm="latebiller" language="en"/>
     1.5  		<explanation language="en">
     1.6  			<text>
     1.7 +				a technique used in charging;
     1.8  				for pre-paid subscribers the standard way to charge services is online
     1.9  				– subscriber's balance is checked in the billing system and if sufficient, the service (e.g. sending a SMS) is provided, otherwise the service is denied;
    1.10  				if the billing system is not currently available (so we can't say if the subscriber's balance is high enough), we can provide the service anyway and try to charge it later;
    1.11 @@ -110,16 +111,21 @@
    1.12  	</concept>
    1.13  	<concept>
    1.14  		<term abbreviation="IM" completeForm="instant messaging" language="en"/>
    1.15 -		<explanation language="en"><text></text></explanation>
    1.16 +		<term abbreviation="OTT" completeForm="over the top" language="en"/>
    1.17 +		<explanation language="en">
    1.18 +			<text>
    1.19 +				a kind of electronic communication between two persons or a group chat;
    1.20 +				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;
    1.21 +				compared to SMS, IM messages are cheap – typically free of charge;
    1.22 +				important IM feature is presence – the sender knows current status of the recipient: online, offline, away, busy etc.;
    1.23 +				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;
    1.24 +				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
    1.25 +			</text>
    1.26 +		</explanation>
    1.27  		<tag>computer</tag>
    1.28  		<tag>messaging</tag>
    1.29  	</concept>
    1.30  	<concept>
    1.31 -		<term abbreviation="OTT" completeForm="over the top" language="en"/>
    1.32 -		<explanation language="en"><text></text></explanation>
    1.33 -		<tag>messaging</tag>
    1.34 -	</concept>
    1.35 -	<concept>
    1.36  		<term abbreviation="IMAP4" completeForm="Internet message access protocol version 4" language="en"/>
    1.37  		<term abbreviation="IMAP" completeForm="Internet message access protocol" language="en"/>
    1.38  		<explanation language="en">