to_xml: How to Add a Namespace to the Root Element Only

[sshaw]

In most cases the namespace only applies to the root element but outputting this sort of XML does not seem possible. For example, given this schema one must output the following:

<ns1:Transmission xmlns:ns1="https://ldex.limra.com/xsd/1.0/LDExBEM">
  <TransmissionGUID>1234106c-d731-466a-8235-3377985285yy</TransmissionGUID>
  <!-- ... -->
</ns1:Transmission>

Now How to achieve this? The namespace method is used "if a node and all its children are all namespaced elements".

The tag method does not accept a namespace argument like element method does. Specifying:

element :transmission_guid, String, :tag => "TransmissionGUID", :namespace => nil

or :namespace => false does not prevent the namespace provided to namespace from being output.

Does not seem possible to output a namespace only on the root element.

[yvesll]

Similar scenario in #217, if you use MRI ruby, you can just define a tag with namespace like:

tag 'ns1:Transmission'

[sshaw]

Thanks @yvesll but that is just an accident and will be fixed soon so not safe to use long-term.