[ 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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