Chris, On 3 Jul 2006, at 18:49, Christopher Smith wrote:
Another rendering for this, which Marvin and I explored a little bit when writing our document, is:
<ActivityState BaseState="running"> <SubState StateName="profile1:Stagingin> <SubState StateName="profile1:Held"/> </SubState> </ActivityState>
I don't think we need two different tags. ActivityState only should work, as the substate concept is captured structurally. My personal preference is still for the subtyping approach, but I can't see myself winning on that one.
It would also be nice to support being in multiple sub states (if it makes sense) because of various profiles and operations, so if (for example) I was in the above state, but the user also suspended the job, I could be in:
<ActivityState BaseState="running"> <SubState StateName="profile1:Stagingin> <SubState StateName="profile1:Held"/> </SubState> <SubState StateName="profile2:Suspended"/> </ActivityState>
This is both interesting and very scary. On the interesting side this make sense: <ActivityState StateName="running"> < ActivityState StateName="profile1:StagingIn/> < ActivityState StateName="profile1:Held/> </ActivityState> The problems I think will arise when we start to describe the semantics. It is scary enough that I don't want to try thinking about it with out others around and a beer. -- Take care: Dr. David Snelling < David . Snelling . UK . Fujitsu . com > Fujitsu Laboratories of Europe Hayes Park Central Hayes End Road Hayes, Middlesex UB4 8FE +44-208-606-4649 (Office) +44-208-606-4539 (Fax) +44-7768-807526 (Mobile)