Orchestra default value

1

@donaldmendelson

How to specify a default (or constant) value of a fieldRef in orchestra?

e.g.
To set a default of a field 123 as “YC: default-value” one wrote it as:

<fixr:field id="123" name="Private" type="string" value="YC: default-value">

And the fieldRef is:
<fixr:fieldRef id="123" instanceName="Private" >

Now, how can one specify that the if the default value of the fieldRef should be “DM: default-value” ?

For more general case please provide examples for:

  1. default value of field
  2. default value of fieldRef
  3. constant value of field
  4. constant value of fieldRef

Thanks in advance

2

The XSD schema shows the following (see also sub-section “Presence” in https://www.fixtrading.org/standards/fix-orchestra-online/#message-structures-1):

  • fieldType defines the field and contains <fieldAttribGrp>
  • fieldRefType defines the field references and contains <fieldAttribGrp>
  • <fieldAttribGrp> contains attributes presence (default is optional) and value

value is defined as follows:

If presence is optional, then it represents a default when the sender does not provide the field. If presence is constant, then it is the constant value.

<fixr:field id="123"value="DM: default-value">
<fixr:fieldRef id="123" instanceName="Private" value="DM: default-value">

<fixr:field id="123" presence="constant" value="HK: constant-value">
<fixr:fieldRef id="123" instanceName="Private" presence="constant" value="HK: constant-value">

@donaldmendelson to verify and confirm…

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3

The default value of a field is addressed in the Orchestra spec in the section Default value of an optional field.

The example given for the default value of TimeInForce:

<fixr:fieldRef id="59" presence="optional" value="0"/>

As Hanno said, the same attributes apply to both <field> for every instance of a field or <fieldRef> for a specific instance.

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