As part of the cross-wiki search results new functionality, we'll need to figure out how best to do scoring and ranking across the sister projects:

• scoring/ranking across wikis can be hard
  • depends on UI (integrated results vs separated results)
• As we are making the content model more rich, we may have additional fields for different content models in each wiki:
  • this can be Flow, structured data, extensions, etc.
  • we need to ensure these fields do not clash
    • i.e. we don't have two extensions which try to use field "my_data" with conflicting definitions
    • or somehow find way of namespacing them.