Get 'data-sort' orthogonal value from DataTables within search.push function

I am looping the rows within $.fn.dataTable.ext.search.push function to select some rows based on many criteria. I am setting some values on the TD of the tables known as orthogonal data. I am trying to get the value of the 'data-sort' but I don't know how. I am able to get the cell's inner data via data[2] (for column 2), but not the 'data-sort' or 'data-filter'. Any ideas?

$.fn.dataTable.ext.search.push(
    function (settings, data, dataIndex) {

        var iRating = parseFloat(data[2]) || 0; // this works 
        var datasort = //somehow get the data-sort from the TD
);

HTML

<td data-sort="57000" class=" seqNum">.....</td>