There is a command group 'az_notification hub_namespace'. This group of commands could 'commands to manage notification hub namespace'. The group of commands has global parameter '--debug' which means 'Increase logging verbosity to show all debug logs.'. The group of commands has global parameter '--help -h' which means 'Show this help message and exit.'. The group of commands has global parameter '--only-show-errors' which means 'Only show errors, suppressing warnings.'. The group of commands has global parameter '--output -o' which means 'Output format.'. The group of commands has global parameter '--query' which means 'JMESPath query string. See <a href="http://jmespath.org/">http://jmespath.org/</a> for more information and examples.'. The group of commands has global parameter '--subscription' which means 'Name or ID of subscription. You can configure the default subscription using `az account set -s NAME_OR_ID`.'. The group of commands has global parameter '--verbose' which means 'Increase logging verbosity. Use --debug for full debug logs.'. This group contains a child command 'az_notification hub_namespace_create'.The syntax is: az notification-hub namespace create --name
                                     --resource-group
                                     --sku {basic, free, standard}
                                     [--location]
                                     [--tags]. The 1th example of the child command would be to use it to 'create a namespace', the syntax is: az notification-hub namespace create --resource-group MyResourceGroup --name my-namespace --location "South Central US" --sku Standard. The parameter '--name -n' is required. It is used to the namespace name.. The parameter '--resource-group -g' is required. It is used to name of resource group. you can configure the default group using `az configure --defaults group=<name>`.. The parameter '--sku' is required. It is used to name of the notification hub sku.. The parameter '--location -l' is optional. resource location  when not specified, the location of the resource group will be used.. The parameter '--tags' is optional. resource tags  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. 