Hi:
Not exactly. WRS is a unique interface, built with Java. When you view a report inside WRS, one of the menu options is to print to PDF (I don't have my WRS started up right now, so I'm not sure of the exact menu choice). So, a report that is viewable in WRS can be printed to PDF.
Stored processes that are displayed in WRS are internally described by a markup language called "SASReport XML" -- this XML is rendered on the screen and would be further rendered to PDF if you did a print to PDF.
From the standpoint of WRS, everything you see on the screen is SASReport XML and the user can choose to print to PDF when/if they want to have a physical copy of the report.
If you are submitting a stored process from the client applications, the 2 clients that will allow you to create PDF files directly from a SP are Enterprise Guide and the Information Delivery Portal. In addition, the Stored Process Web Application (SPWA) will allow you to run stored processes from a URL (outside the Portal -- for example, if you had your own front end reporting system that used HTML) and with the SPWA, you can generate almost any kind of results.
For more information about how to generate PDF output inside WRS, you might consider contacting Tech Support.
cynthia