A reference to a JMX point consists of an Object name, a Attribute name, and optionally - if the attribute is a composite data type - a Composite item name. The simplest way to find values is to use the JMX server inspection feature.
The point Data type is the Scada-LTS representation of the value, not the JMX value type. Regardless, it is best to match the data type as closely with the JMX type for best results.