Google patents generation of output sequence from input using Neural Net

Claim 1:

A method comprising: obtaining an input array; using an encoder recurrent neural network to generate a hidden state for each input; and generating output by: generating an attention vector for the position in the output order; using the attention vector to generate a sorting weight; using the sorting weight to get, a pointer to a particular position in the input order;

So basically, sort an array by neural network. How is this novel?