2015-02-28-Preview: This is the new “prototype” version where we bring in new experimental features. In this version you will find the enhancements to multilanguage support as well as the new “more like this” feature.
Natural language processors from Microsoft (the same ones used by Office and Bing) offer greater precision over query results and more languages.
moreLikeThis is a a query parameter used in Search operations that finds other documents that are relevant to another specific document.