Default Element

Calculates a value to be used as the value of this field, but only if the field does not already have a non-null value. Default is essentially the same as Derivation, except that the value applies only if the current value is non-null. Default expressions are calculated when:

• the form is first loaded

• data is retrieved from one or more resources

• the form is recalculated or saved until the field value is non-null.

Example

This example shows a field definition that uses string manipulation expressions to return a default account ID composed of the first initial of the first name plus the user’s last name.

<Field name=’waveset.accountId’>
   <Display class=’Text’>
      <Property name=’title’ value=’AccountID’/>
   </Display>
   <Default>
      <concat>
         <substr>
            <ref>accounts[AD].firstname</ref>
               <i>0</i>
               <i>1</i>
            <ref>accounts[AD].lastname</ref>
         </substr>
      </concat>
   </Default>
</Field>