[gme-users] Defining sequences of meta-types + comments/notes onthe meta-model

Chris vanBuskirk Chris.vanBuskirk at vanderbilt.edu
Wed Jul 29 14:42:01 CDT 2009

Here is a "graphical" sequence:


> -----Original Message-----
> From: gme-users-bounces at list.isis.vanderbilt.edu 
> [mailto:gme-users-bounces at list.isis.vanderbilt.edu] On Behalf 
> Of Ioannis Ntalamagkas
> Sent: Wednesday, July 29, 2009 11:38 AM
> To: gme-users
> Subject: [gme-users] Defining sequences of meta-types + 
> comments/notes onthe meta-model
> Hello all,
> I apologise if my questions sound naive or if they have been already 
> answered (I browsed the archives of the past two years and I 
> didn't find 
> anything similar).
> I want to define a type X that contains a *sequence* of instances of 
> type Y. The only way that comes to my mind is that Y contains 
> an integer 
> attribute termed "order". Y then needs an OCL constraint that 
> will check 
> that all Ys are in sequence. Is there any better (simpler) way to 
> achieve the same effect?
> Also, is there a way to add comments/notes on the meta-model 
> directly? I 
> am asking because in complex meta-models some things may not be 
> straightforward to understand by latter users of it (under the 
> assumption that the original developer/expert is no longer available).
> Thanks a lot,
> Yannis
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