The condition type
Exists checks if the data specified in the
ApplyTo tag is not null. It is especially useful in conjunction with the
SaveAs condition tag.
Example
<Conditions>
<Or>
<Exists>
<ApplyTo>Form.Submit.Field(Name:SWECmd).Value</ApplyTo>
<SaveAs>Command</SaveAs>
</Exists
<Exists>
<ApplyTo>Form.Submit.Field(Name:SWEMethod).Value</ApplyTo>
<SaveAs>Command</SaveAs>
</Exists>
</Or>
<Exists>
<ApplyTo>Command</ApplyTo>
<SaveAs>PageName</SaveAs>
<SaveMode>Append</SaveMode>
</Exists>
</Conditions>