Outputs

Data from the model is send to output writers, defined by a routing configuration:

routing
  - decoder_index: 0
    domain: 0
    outputs:
      - <output type1>:
          <options>
      - <output type2>:
          <options>

Each routing entry specifies the outputs that will produced for a single decoder and output domain. As models can have multiple decoders, decoder_index specified the index into this list of decoders. In many cases, this is just 0. If you have a stretched-grid model, you will have 2 (or possibly more) domains. Domain specifies which index into this list you are writing outputs for.