I am doing a project on Petri nets. I have generated an activity diagram (in the .xmi format) 开发者_高级运维using the UML tool Umbrello.I need to convert it to a Petri net and then synthesize it usi
Ruby: 1.9.2 Rails: 3.0beta3 I need some help with associations in Rails 3. I have the following models (see excerpts below):