Issue subsystem general description

Issue subsystem

An issue describes a condition in a model. Issues are categorized by severity in the following way

• Fatal issues describe severe errors which for example prevent simulation
• Error issues describe clear errors, which require user attention
• Warning issues are indications that something may be wrong
• Note issues are reminders about important things
• Info issues are pieces of information linked to objects

Issues are somewhat related to events. The main difference between issues and events is that while events happen at a particular time, issues are conditions with a lifecycle. The different issue states are

• Active, which means that the condition is true
• Resolved, which means that the condition is no longer true

Issues are identified by the following data

• A type resource
• A main context resource
• A list of secondary context resources

§ All issues are required to be part of a model (by ConsistsOf). § All issues are managed by an issue source

Issue sources are divided into the following categories

• Batch issue sources, which can compute on demand a set of issues

from given context

• Continuous issue sources, which can track the set of issues from given context

All issues declare the following properties needed to e.g. display the issue in the Issue View.

• Description, which is a one-line text about the issue
• Resource, which is a textual representation of the main context resource
• Path, which us a textual representetion of the location of the main

context resource