Hello again dserodio,

JUDE completely understands Subsystems as the quoto you pasted at your first post.

There is a presentation option for Subsystem notation.
Quote:From "OMG Unified Modeling Language Specification March 2003 Version 1.5 formal/03-03-01 :
3-14-3, Subsystem-Presentation Options" http://www.omg.org/docs/formal/03-03-01.pdf

So technically by adding the <<subsystem>> stereotype to a package, it transforms into a Subsystem like you mentioned but there will be no "pitchfork" icon shown in the notation when you do it. It is because that JUDE does not support the notation feature to change "Package notation" into "Subsystem notation" with pitchfork when adding <<subsystem>> stereotype to it. And like the presentation option says "the pitchfork symbol can be replaced by the keyword <<subsystem>> placed in a large rectangle".