Discovery: include word proximity in search results

[pdpinch]

in multi-word searches, is there a way we can weight search results higher when the words appear in close proximity?

Another approach to #866

[pdpinch]

@pwilkins does this make sense?

[pwilkins]

Yes, Elasticsearch supports proximity. We "simply" have to add proximity support to the tool chain that generates an index. (The tool chain is called an analyzer.) This article section provides a high-level description of how this feature works.

https://www.elastic.co/blog/found-text-analysis-part-1#optimizing-phrase-searches-with-shingles

As @giocalitri mentioned in our f2f meeting, we should be prepared for this to create larger index files. Perhaps significantly larger.