How do I pull a critdate revised value into a Native PDF template from the ditamap?

Hello!

I'm trying to pull a revised critdate value from a ditamap into a Native PDF template. I've been able to pull in other metadata, but I've tried several iterations here and I'm not having any luck.

I've attached a screenshot of the ditamap I'm working with.

Here are a few iterations I've tried:

<span data-field="metadata" data-format="default" data-subtype="//critdates/revised/" style="float: right">Revised Date</span>

<span data-field="metadata" data-format="default" data-subtype="//critdates/revised/@modified" style="float: right">Revised Date</span>

Where am I going wrong or what am I missing?

As always, thanks for your help!

Josh