How do you use "DITA Profiling / Conditional Text" with the SDL Publication Manager?

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