Problems with multipolygon consisting of several separate areas with same primary tag but different secondary tags.

[skyper]

This came up in #19136, see my comment 22 and followups.
I've created an example file:
josm_19136_multi_with_same_style_sample.osm​

If I have two parts of a forest with a name in common but the parts have different operator and different leaf_type. I need to leave the secondary tags on the parts and maybe use more general values for the multipolygon.

• Only secondary tags on a area without primary tag is not working
  • "Create multipolygon" just does that
• Only a cheat, creating multipolygons for each area and an additional one for the group is accepted by validator
• I do not use type=site as ​osmwiki:Tag:type=site explicitly stats:

  This relation is not to be used in cases where the element can be represented by one or more areas and neither linear ways nor nodes outside these areas would have to be included or excluded from within these areas.
  

Relative:URL: ^/trunk
Repository:UUID: 0c6e7542-c601-0410-84e7-c038aed88b3b
Last:Changed Date: 2020-04-23 21:58:14 +0200 (Thu, 23 Apr 2020)
Revision:16376
Build-Date:2020-04-24 01:30:45
URL:https://josm.openstreetmap.de/svn/trunk