User:Deskana (WMF)/Search/Interwiki

The problem

 * Search infrastructure and performance has been improved such that interwiki search is once again a possibility to have on the Wikimedia wikis.
 * How is this feature to be handled from a product perspective? For example, do we integrate into the current search, or do we have a separate interwiki search?

Current process
A person searches for keyword x on a Wikimedia wiki. There are several possibilities:
 * 1) There is no article with that title on any Wikimedia wiki.
 * 2) There is no article with this title on the wiki they're currently looking at, but there is an article on another wiki (or multiple wikis).
 * 3) There is an article with that title on their current wiki, but no exact matches on other wikis.
 * 4) There is an article with that title on their current wiki, but there are also exact matches on other wikis.

Currently, 1. and 2.
 * 1) Telling the user their current wiki does not have an article

Random notes
Worth considering whether search should work the same across different namespaces.