[Tagging] Feature Proposal -- RFC -- service=irregular

[Markus]

Hi Martin,

On Mon, 1 Apr 2019 at 18:21, Martin Koppenhoefer <dieterdreist at gmail.com> wrote:
>
> this should get a different name, many people would call their tram, light rail or underground service "irregular" (from a subjective point of view: you wait for a means and it arrives too late). Not sure how to better call it, maybe "internal" or "operational" use?

Thanks for your advice! I didn't think of that. However, "operational"
can be understood as any track that is functional, and other service
tracks are also "internal". What about auxiliary, alternative, reserve
or diversion?