Each folder is contained in a separate NameValueData field, each of which is preceded by a NameValueLength field.
com.ourcompany.xxx or com.ourcompany.ourData
The <psc> folder is used to convey publish/subscribe command messages to the broker.
Only one psc folder is allowed in the NameValueData field.
See Command messages for full details.
The <pscr> folder is used to contain information from the broker, in response to publish/subscribe command messages.
There is only one pscr folder in a response message.
See Broker Response message for full details.
The broker ignores this folder in messages that it receives from publish/subscribe applications.