GETKEYSA
This function returns a list of all keys from an xml variable as an array. It is similar to the GETKEYS function, which returns the keys as a string.
           You can use the asterisk (*) character at the beginning or end of a string as a wildcard. For example, to return particular keys or properties. Asterisks within a string do not act as wildcards. A wildcard search returns only the first matched key or property. 
           
         
            Note: We cannot guarantee the order in which keys or properties are matched.
           
          Syntax
 =GETKEYSA("XML_properties")
#ARRAY is displayed in cells that contain arrays.
Example
=GETKEYSA(ReportVariables.rv_xmlvariable.text)
           
            Note: In GETKEYSA, the 
           .text attribute is required. In GETKEYS, the .text attribute is optional.
           GETKEYSA is a list function. It can be used in server lists, relational lists, and in slices.