Editor autocomplete return values

Good afternoon (o;

As my project already uses autocomplete from jqueryui I give it a go as well with the editor..
But I am stuck what to exactly return from the ajax call.

Got this framework I've found here:

            label: "Artikelnummer",
            name: "Artikelnummer",
            type : "autoComplete",
            minLength: 2,
            opts: {
            source: function (query, result) {
                        $.ajax( {
                            url: '/inc/get.products.php',
                            dataType: 'json',
                            success: function ( data ) {
                                result ( $.map( data,    function (item) {
                                    console.log(data.data);
                                    return {
                                        label: data.data.number, << no clue yet (o;
                                        value: data.data.number << no clue yet (o;
                                    };
                                }
                            )
                            )
                        }
                    });
            }
            }

The PHP code just returns an array with all products availabe, and the editor autocomplete should fill then two fields automatically when selected...

So my simple question..what exactly do I have to return in the ajax call to autocomplete so it displays the product list matching they typed input?

I'm not that JS guru (o;

thanks in advace
richard