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Account billing and packages
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General
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Realtime API and client libraries
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Troubleshooting
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Channels
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REST API and client libraries
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Ably error codes
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Account and app setup and configuration
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Ably architecture, transports, and security
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Performance and Redundancy
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Push Notifications
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Integrations
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Migrating to Ably from an existing service
What restrictions exist for the names of channel rules / namespaces?
Channel namespace can contain any unicode character (including e.g. spaces), with the following exceptions:
- They cannot start with a square bracket [
Square brackets are reserved as a means to provide metadata or instructions to Ably about the intended channel when subscribing. - They cannot contain a colon :
Colons are used to delimit channel namespaces. Find out more about channel namespaces - They cannot be empty.