issue labeling scheme

Hans Ekkehard Plesser edited this page Nov 29, 2016 · 8 revisions

Issue Labels

Each pull-request (PR) and issue is labeled along five "dimensions", each with its own color family:

To get an overview of how often each label is used go to the labels page.

Label Rules

  • the category letters ensure same order in issue list
  • only single label per category is allowed

C: Component

A component label specifies in which part of NEST the issue is located.

C: Kernel Kernel

  • changes in the NEST kernel

C: Documentation Documentation

  • Documentation updates, fixes, ...

C: Infrastructure Infrastructure

  • changes in the build system or CI scripts

C: Installation Installation

  • issues regarding the installation of NEST, e.g. on different platforms

C: Interpreter Interpreter

  • changes in the SLI iterpreter

C: Model Model

  • new or modified neuron or synapse models


  • changes in the high level python interface of NEST

I: Interface

The interface label specifies if and where there are changes for users and/or developers.

I: User Interface User Interface

  • changes to the user interface

I: BehaviourChanges Behaviour changes

  • changes to the semantics of parameters or return values, while keeping the same API
  • changes in the effect of a method

I: External API External API

  • external API is what is defined in nest.h
  • change that requires users of NEST to change their code accordingly

I: Internal API Internal API

  • internal API is everything that is not external: Typically the kernel interfaces, managers, etc.
  • change that modifies the calls to functions not usually handled by users
  • NEST developers need to be aware about the new structure/parameters/methods...

I: No breaking change No breaking change

  • no change to any API that would break existing code
  • anything that compiled before should still compile afterwards

P: Progress

The progress label gives information about the status of the issue/PR. The normal work-flow would be pending -> in progress -> PR created (-> closed).

P: Blocked Blocked

  • work on this issue is not possible due to another issue
  • blocked by another PR that has to be merged first

P: PR Created PR Created

  • the issue advanced a lot, a solution exists and a corresponding pull request has been created

P: In Progress In progress

  • someone started and is actively working on this issue

P: Pending Pending

  • new issue where no-one has worked on yet

P: Reminder Reminder

  • nothing to be worked on, just to keep in mind. Typically goes together with T:Discussion.

S: Severity

S: Critical Critical

  • critical, bugs that need to be fixed asap.
  • needs to be fixed before the next release

S: High High

  • default priority for bugs, important enhancements

S: Low Low

  • default priority for everything but bugs, bugs that appear in very corner cases

T: Type

The type label specifies what this issue actually describes.

T: Bug Bug

  • bugs

T: External bug External bug

  • bugs that result from software outside, that we can not fix ourselves / that are beyond our control

T: Enhancement Enhancement

  • new/added features
  • anything that NEST couldn't do before

T: Maintenance Maintenance

  • refactoring
  • cleaning of unused NEST::Names

T: Discussion Discussion

  • ideas, wishlist, everything that needs comments from the community or has to be condensed to a more concrete plan


This scheme was inspired by

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