How works the public transport layer?

[JonathanMM]

Hello,
I don't understand how works the public transport layer, specifically why a line is available on it or not.
I'm from France, Paris region, and I can see all metro lines, all RER lines and airport lines too (CDG val and OrlyVal). But, all tramways and Transilien (regional trains, like RER lines but without cross Paris) are not displayed.
After some search, I found these pages: https://cdn.organicmaps.app/subway/france.html and https://docs.google.com/spreadsheets/d/1SEW1-NiNOnA2qDwievcxYV1FOaQl1mb1fdeyqAxHu3k/edit?gid=112805400#gid=112805400 which include, for the first the metro and RER, and the second, these two networks in Rapid tab.
I should understand why the application only display the subway lines, and not the other mode of transportations.

[biodranik]

Only modern subway mapping metro osm scheme is supported.

Check more info here: https://cdn.organicmaps.app/subway/
and here https://docs.google.com/spreadsheets/d/1SEW1-NiNOnA2qDwievcxYV1FOaQl1mb1fdeyqAxHu3k/edit?usp=sharing

[JonathanMM]

Thanks @biodranik I guess, to have repost link I already put in my original message ^^'

If I check the T1 line for example, it already follows the public transport schema v2 (see https://www.openstreetmap.org/relation/2572573 ). In fact, the relation is very similar with a line of metro displayed in the application: https://www.openstreetmap.org/relation/3326845

So, I still not understand why one is displayed and not the other.

[biodranik]

This is a tram scheme, not a metro scheme. Trams are not yet supported.