[OASIS Issue Tracker] (MQTT-233) Modify Language around use of $ topics

[OASIS Issues Tracker <workgroup_mailer@lists.oasis-open.org>]

    [ https://issues.oasis-open.org/browse/MQTT-233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=58943#comment-58943 ] 

Richard Coppen commented on MQTT-233:
-------------------------------------

Reviewed on TC call 12.02.2015
https://www.oasis-open.org/apps/org/workgroup/mqtt/download.php/55197/OASIS_MQTT_TC_minutes_12022015.pdf

> Modify Language around use of $ topics
> --------------------------------------
>
>                 Key: MQTT-233
>                 URL: https://issues.oasis-open.org/browse/MQTT-233
>             Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
>          Issue Type: Improvement
>          Components: futures
>    Affects Versions: 3.1.1
>         Environment: All
>            Reporter: Marco Carrer
>            Priority: Critical
>
> Section 4.7.2 Topics beginning with $ states 'The Server SHOULD prevent Clients from using such (where 'such' means topics beginning with $) Topic Names to exchange messages with other Clients'.  We think this is a bit restrictive and should not necessarily be strictly enforced by the broker.  
> Instead we would prefer the 'SHOULD' be changed to a 'MAY'. This is consistent with the Non normative comment which states that "Applications cannot use a topic with a leading $ character for their own purposes".
> We would prefer a language that leads broker implementations to may allow the use of $ topic namespaces through configurable options rather block such topics in an hard-coded way.



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