Xstore V17 - How to make form text field read only (non-editable)?

Hi,

Xstore Version 17.0.1

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I have defined the form field definition in FieldDefinitionConfig.xml as below -

<Field name="emailAddress" type="Text" resource="emailAddress" dataFieldRef="Disabled" />

I could see the entry in DataFieldConfig.xml as below -

  <DataField name="Disabled" editFormat="Simple">

    <EntryDisabled dtype="Boolean"><![CDATA[true]]></EntryDisabled>

  </DataField>

But it's NOT working. In older version forms, we have ReadOnly attribute. In the newer version forms, does any one know how to make the form text field read only (non-editable)?

Thanks,

Krishna