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Subject: [OASIS Issue Tracker] (MQTT-233) Modify Language around use of $ topics
[ https://tools.oasis-open.org/issues/browse/MQTT-233?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=37540#comment-37540 ] Richard Coppen commented on MQTT-233: ------------------------------------- Discussed on TC call 29.05.2014 and moved to futures component. The $ topic domain has been discussed a number of times by the TC. The thread was started initially as part of MQTT-16 which defined much of the current wording. The intention was to avoid future application migration problems while recognizing current server implementations use the $ prefix as a home for topics with special meaning. The TC will continue the conversation separately to progressing 3.1.1 > Modify Language around use of $ topics > -------------------------------------- > > Key: MQTT-233 > URL: https://tools.oasis-open.org/issues/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. -- This message was sent by Atlassian JIRA (v6.2.2#6258)
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