Query system database in community edition

How do I query the system db in the cypher command line tool.There is no USE command offered in my community install to switch from the default into the system schema and I can't run any of the queries on the system database unless I can switch in to it. Is this correct? There are a number of commands in the cypher manual which need access to the system db

Can you elaborate on what these queries might be? Are you looking for these procedures?

It is given in the documentation