Discovery/Status updates/2018-05-28

This is the weekly update for the week starting 2018-05-28

Search

 * Erik worked on evaluating and building out features provided by `query_explorer` functionality of learning-to-rank plugin, there is lots of good info in the ticket
 * David worked on allowing searches with "all:" keyword to also work on non-English projects, and not only with its translations ("searchall")
 * David increased the cirrus indices to have more shards for enwiki_general, viwiki_general and wikidatawiki_content
 * David reverted an earlier patch that had depreciated the global namespace handling of the prefix keyword; the new patch was deployed — prefix and associated InputBox forms should work as before.
 * Trey and Gehel deployed the updated search/extra plugin and search/extra-analysis-slovak plugin with Slovak Stemmer and will be available after a re-indexing
 * Stas enabled deep category support on all wikis (except private)
 * Stas reindexed wikidata to enable support for searching for string & external ID property values ,
 * Stas implemented basic text indexing for Lexemes

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