Given a schema of the sort:

[my:author] > mix:versionable primaryitem my:username

  - my:username (STRING) mandatory queryops '=, <>, <, <=, >, >=, LIKE'

  - my:email (STRING) mandatory queryops '=, <>, <, <=, >, >=, LIKE' VERSION

[my:text]  > primaryitem my:title

  - my:title (STRING) mandatory queryops '=, <>, <, <=, >, >=, LIKE'

  - my:author (REFERENCE) mandatory

   - my:body (STRING) mandatory queryops 'LIKE'

How would one go about creating an index for my:text instances based on the author's username and/or email? I can see how this is done for "primitive" properties (here: Query and search - ModeShape 5 - Project Documentation Editor), but I don't see how this is done for properties of reference nodes (that is, for nested properties). I'd like to be able to do something of the sort:

       "textByAuthorUsername" : {

            "kind" : "value",

            "provider" : "local",

            "synchronous" : "true",

            "nodeType" : "my:text",

            "columns" : "my:author(REFERENCE):username"

        },

       "textByAuthorEmail" : {

            "kind" : "value",

            "provider" : "local",

            "synchronous" : "true",

            "nodeType" : "my:text",

            "columns" : "my:author(REFERENCE):email"

        }

Does ModesShape support indexing nested properties? If not, what would be a recommended strategy, which ideally would not involve abandoning usage of node references?