Support subdocuments with various relevance or scores based on the text match weight of those sub-documents.

Example Schema:

{
 name: 'Bob Jones, Lord of Waking',
 favorites: [{title:'The Kraken Wakes'}, {title:'Lord of Light'}]
}

db.users.ensureIndex({name:'text', 'favorites.title':'text'});

db.users.runCommand('text', {search:'lord'});

Results would include a 'score' value of the entire document and a 'score object' that includes the scores in-place for each sub-document.

Example 'scores' object:

 "score" : 0.75,
 "scores" : {_:.75,favorites:[{_:0}, {_:0.88}]