Read rpdl.value.ArrayValue and insert it to parent
Read rpdl.value.BooleanValue and insert it to parent
Read rpdl.value.IdentifierValue and insert it to parent
Read rpdl.value.NumberValue and insert it to parent
Read rpdl.node.ObjectNode and insert it to parent
Read rpdl.node.Parameter and insert it to parent
Read rpdl.value.StringValue and insert it to parent
Read rpdl.value.Value and insert it to parent
Declare interface for readers and tell them - how to read each type of node to file.