[ https://issues.oasis-open.org/browse/MQTT-563?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=77563#comment-77563 ]
Allan Stockdill-Mander commented on MQTT-563:
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Rewrite to remove the references to length and write such that US-ASCII is a minimum supported set.
> Client Id format
> -----------------
>
> Key: MQTT-563
> URL: https://issues.oasis-open.org/browse/MQTT-563
> Project: OASIS Message Queuing Telemetry Transport (MQTT) TC
> Issue Type: Task
> Components: MQTT-SN
> Reporter: Simon Johnson
> Assignee: Allan Stockdill-Mander
> Priority: Major
>
> It was discussed that aligning the clientId format (23 UTF-8 bytes) to MQTT 5.0 was potentially dangerous in SN given the complexity of validation etc. However given ASCII is a subset of UTF-8 it is upon the broker & client implementation to enforce a more restrictive set if required. A note in implementation is required for this item.
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