1. On Page 31, step 4 and 5 of Creating binding identifiers, it says "Binding identifier: dataSourceAdmin " twice. Is this correct?
2. On Page 31, step 4 and 5 of Creating binding identifiers, it says "String Value: the JNDI name of the Admin data source for your data schema " and "String Value: the JNDI name of the Admin data source for your rules schema ". However the installation guide, on page 37 step 5, tells creating only one JNDI name of the Admin data source, not specifying rules schema nor data schema. What should be entered for String Value of step 4 and 5 on Page 31?
On Tomcat I have a datasource jdbc/AdminPegaRULES and then I have entries like this which would be the equivalent to the bindings you need to create in WAS. So in answer to your question #2 you would have a single jdbc/AdminPegaRULES datasource and then set both of the bindings to it.
Because the IBM WebSphere Application Server Liberty Core uses the server.xml file to configure communication between the Pega 7 Platform and the application server, the Liberty documentation does not change.