Use an array to filter on a dimension with multiple values

When you use the getdataAsString function, you only can filter each dimension by one value.

like in the example in the help button.

DS_1.getDataAsStringExt("Sales", {"0MATERIAL":"P4711", "0CALYEAR":"2012"});

However if you want to have for example 2012 and 2013,

you add {"0CALYEAR":["2012","2013"]}); it says "Cannot convert from "StringArray" to "InputString""

I have checked Display Total Value on a label from (April 2014) where David Gyurasz  mentions is not possible to format of defining multiple values using the JSON Format.

Is that still the case? there is no way to use an array to list multiple values? If so how?

Thanks,

Alexandre