220b90e6_wiki_first_grid___jqGrid_Wiki__Property
[Description] This tells jqGrid the type of information being returned so it can construct the grid. In this case, we tell the grid that we expect XML data to be returned from the server, but other formats are possible. For a list of all available datatypes refer to API Methods [Property] 
datatype
wiki:first_grid - jqGrid Wiki
Property