fCountPrimaryExpression = function(nCategory, sName) {
           if (!oSourceElementData.aCount[nCategory].hasOwnProperty(sName)) {
             oSourceElementData.aCount[nCategory][sName] = 0;
             if (-1 === oSourceElementData.aPrimitiveValues.indexOf(sName)) {
               oSourceElementData.aPrimitiveValues.push(sName);
             }
           }
           oSourceElementData.aCount[nCategory][sName] += 1;
         }
Increments the count of the number of occurrences of the prefixed
String representation attributed to the primary expression.
@param {number} nCategory The category of the primary expression.
@param {string} sName The prefixed String representation attributed
    to the primary expression.