[Standards] XEP-0184: <received/> vs. <displayed/> vs. <read/>

Yann Leboulanger asterix at lagaule.org
Thu Jun 17 13:45:33 UTC 2010

On 06/17/2010 03:29 PM, Konstantin Kozlov wrote:
> Kevin Smith wrote:
>> On Wed, Jun 16, 2010 at 8:10 PM, Konstantin Kozlov <yagiza at yandex.ru>
>> wrote:
>>> Yes. Let's sort out what means "received", "displayed" and "read" to
>>> decide which of them are needed and which are not.
>> Yes.
>> So:
>> What's the use case for needing to know when the user's client has
>> received the message?
> If sender wants to be sure, that client on the other side received and
> processed the message. So, the sender is sure that once the user on the
> other side will pay attention to its client application, he'll be able
> to read the message.
> If delivery of all the previous messages were confirmed by the <received
> /> reply and THIS one was not, the sender may assume, that the message
> was lost somehow and may try to resend it (if he wants).

This helps knowing which messages are lost in cases of brutal 
disconnection, decrypt failure, ...

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