In a stream definition in an output adapter map file, field specifies a column in a stream to publish.
adapter                       (required, limit one)
  |----rfa                               (required, limit one)
  '----subscriptions                     (required, limit one)
         '----subscription               (required)
                '----stream              (required)
                       |----name         (required, limit one)
                       |----stale        (optional)
                       |----field        (required)
                       '----constant     (optional)
stream
None
| Name | Description | Requirement | 
|---|---|---|
| column | A number that represents the position of the source column in the stream being published from (the first column in the stream has the number 0) | Either column or columnName is required | 
| columnName | The name of the column in the Event Stream Processor stream that carries the stream's unique identifier | Either column or columnName is required | 
| name | The FID that identifies this data value when published to RMDS | Required | 
| precision | An integer that specifies the total number of digits after the decimal point in the published value (for example, 1.23 has a precision of 2) | Optional | 
The precision attribute should be included only for columns of datatype double.
<stream name="stream1" >
        <name column="0"/>
        <stale column="3" name="ACVOL_1"/>
        <field column="1" name="DSPLY_NAME" />
        <field column="4" name="BID" precision="47" />
        <field column="5" name="ASK" precision="0" />
        <field column="6" name="TRDPRC_1"/>
        <field column="7" name="ACVOL_1"/>
        <constant name="PROD_PERM" value="1"/>
</stream>
The adapter is configured to publish updates from the fourth, fifth, sixth and seventh columns of the Event Stream Processor stream named stream1 as data items named BID, ASK, TRDPRC_1, and ACVOL_1, respectively.