ElasticSearch model evolution

gistfile1.json

//simple
{
  "picture_url" : "http://foobar.com/1234",
  "text"        : "some text"
  "user_name"   : "John"
  "created_at"  : 2012-2-29
}

//embedded
{
  "picture_url"  : "http://foobar.com/1234",
  "interactions" : [
    { "text" : "some other text", "user_name" : "Jane" }
    { "text" : "some text",       "user_name" : "John" }
  ]
}

//parent/child
{
  "picture_url" : "http://foobar.com/1234",
  "id"          : 1234
} //parent
{
  "_parent"   : 1234,
  "text"      : "some text",
  "user_name" : "John"
} //child