I want to write areas with holes as "osm_relation_type=multipolygon".

It works fine when I give the objects directly to the OSM-writer (FME does all the work).

However, I would like to assign the node/way/feature-ID myself and determine the number of vertices of a "way" myself.

I tried following workflow:

1. Getting a "feature-ID" to the area
2. Splitting the areas in simple features an features with holes
3. Extracting the outershell and hole
4. Writing the tag "role=inner" (hole) and "role=outer" (outershell) to the geometry
5. Splitting the geometry after 1964 (e.g. year of birth) vertices
6. Copy the "feature-ID" to "feature_relation_id"
7. Getting a "way-ID" to the way
8. Joining a feature and it's ways by "feature-ID" and the attribute "feature_relation_id" an creating the members (ref/role/type)
9. Dropping the original feature-geometry
10. Add the attributes "user", "timestamp", "version" and "visible".
11. Hoping the OSM-writer understands what I'm done.

Everything looks good in the inspector. But this doesn't work.

I have attached a screencopy of the inspector and my workbench (2020.0).

Thank You very much for Your help.