Sorting by measures

[brindlogcool]

I am trying to sort the table created on the fly using the measures.

var measure = {

                    "qDef": {

                        "qDef": (expression),

                        "qLabel": (title)        

                    },

                   "qSortBy": {

                            "qSortByExpression": -1,

                            "qExpression": {

                                "qv": "expression"

                            }

                    }

                };

it is not working.. Any specific parameter has to be added?