2.4.3.9.2 getDOM
Function Signature: node-set xdXDocument:getDOM(Name)
This function MUST take one parameter:
Name: This parameter MUST be a string. It MUST be the name of a secondary data source.
The function MUST return the data object with the given name. Node-set is specified in [XPATH] section 3.3. String is specified in [XPATH] section 3.6.