ecearth3/sources/xios-2.5/inputs/Basic/iodef.xml

<?xml version="1.0"?>
<simulation>
  <context id="test_domain">
    <file_definition type="one_file" par_access="collective"  output_freq="6h" sync_freq="6h" output_level="10" enabled=".TRUE.">
      <file id="output_domain">
        <field id="field_domain_1" grid_ref="domain" operation="average" freq_op="1ts" prec="8" />
        <field id="field_domain_2" domain_ref="domain" operation="average" freq_op="1ts" prec="8" />
      </file>
    </file_definition>

    <grid_definition>
      <grid id="domain">
        <domain domain_ref="domain"/>
      </grid>
    </grid_definition>

   <domain_definition>
    <domain id="domain"/>
  </domain_definition>
  </context>

  <context id="test_axis">
    <file_definition type="one_file" par_access="collective"  output_freq="6h" sync_freq="6h" output_level="10" enabled=".TRUE.">
      <file id="output_axis">
        <field id="field_axis" grid_ref="domain" operation="average" freq_op="1ts" prec="8" />
      </file>
    </file_definition>

    <grid_definition>
      <grid id="domain">
        <axis id="x" />
        <axis id="y" />
      </grid>
    </grid_definition>
  </context>

  <context id="xios">
      <variable_definition>
        <variable_group id="buffer">
            <variable id="optimal_buffer_size" type="string">performance</variable>
            <variable id="buffer_size_factor" type="double">1.0</variable>
        </variable_group>

        <variable_group id="parameters" >
          <variable id="using_server" type="bool">false</variable>
          <variable id="info_level" type="int">50</variable>
          <variable id="print_file" type="bool">true</variable>
        </variable_group>
      </variable_definition>
  </context>
</simulation>