There is a command group 'az_apic_metadata'. This group of commands could 'commands to manage metadata schemas in api center'. 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_apic_metadata_create'.The syntax is: az apic metadata create --assignments
                        --metadata-schema
                        --resource-group
                        --schema
                        --service
                        [--file-name]. The 1th example of the child command would be to use it to 'create metadata example 1', the syntax is: az apic metadata create --resource-group api-center-test --service-name contoso --name "test1" --schema '{"type":"string", "title":"First name", "pattern": "^[a-zA-Z0-9]+$"}' --assignments '[{entity:api,required:true,deprecated:false}]'. The 2th example of the child command would be to use it to 'create metadata example 2', the syntax is: az apic metadata create --resource-group api-center-test --service-name contoso  --name testregion --schema '{"type":"string","title":"testregion","oneOf":[{"const":"Region1","description":""},{"const":"Region2","description":""},{"const":"Region3","description":""}]}' --assignments '[{entity:api,required:true,deprecated:false},{entity:environment,required:true,deprecated:false}]'. The parameter '--assignments' is required. It is used to defines the assignment scope for the custom metadata, e.g. "[{entity:api,required:true,deprecated:false}]". the available entity values are: api, deployment, environment.  support shorthand-syntax, json-file and yaml-file. try "??" to show more.. The parameter '--metadata-schema --metadata-schema-name --name' is required. It is used to the name of the metadata schema.. 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 '--schema' is required. It is used to json schema defining the type.. The parameter '--service --service-name -s' is required. It is used to the name of the api center service.. The parameter '--file-name' is optional. name of the file from that contains the metadata schema.. 