How do you pass DITA profiling attributes (platform, etc.) using the SDL Publication Manager when creating PDF output?

Hello, 

We are using SDL Tridion Docs 13 SP2.

How do you use "DITA Profiling / Conditional Text" with the SDL Publication Manager?  We have a lot of content that uses the standard DITA platform attribute to conditionally filter between 'desktop' versus 'mobile app' environment.  For example,

<p platform=“desktop”>Do this when on a desktop environment.</p>

<p platform=“mobile”>Do this when in the mobile app.</p>



How do we set and manage the default DITA profiling attributes (productplatformaudiencerevprops, and otherprops) using the SDL Publication Manager to generate PDF and HTML output?


thank you
paul