Pinging @elastic/es-search (:Search/Mapping)

Had a quick look and I'm not sure about compatibility with intervals. How would an interval query work with this field value with a mixed-case annotation: [JFK](John+F+Kennedy)

I can't use a terms query in the interval and the match query forces lowercase because that's what the host text field uses:

{
"intervals" : {
  "headline" : {
	"all_of" : {
	  "ordered" : true,
	  "intervals" : [
		{
		  "match" : {
			"query" : "he visited",
			"max_gaps" : 0,
			"ordered" : true
		  }
		},
		{
		  "any_of" : {
			"intervals" : [
			  { "match" : { "query" : "John F Kennedy" } },
                               { "match" : { "query" : "Marilyn Monroe" } }
			]
		  }
		}
	  ]
	}
  }
}

If that's opening a can of worms maybe we can separate the "make interval queries work with annotations" into a different PR.

@markharwood you can specify an analyzer for an intervals match source, so if you have mixed-case or multiple-term annotations then you can query for it with analyzer: keyword