anchor.diff:  {
   	"AoMeasurement": {
   		"measurement_begin": {
  -			"$gte": "2012-04-23T00:00:00.000Z"
  +			"$gte": "2012-04-23T00:00:00.000Z",
   			"$lt": "2012-04-24T00:00:00.000Z"
   		}
   	}
  
positive.code: 	"AoMeasurement": {
  		"$or": [{
  			"measurement_begin": {
  				"$gte": "2012-04-23T00:00:00.000Z"
  				"$lt": "2012-04-24T00:00:00.000Z"
  			}
  		}
  		{
  			"measurement_begin": {
  				"$gte": "2012-05-23T00:00:00.000Z"
  				"$lt": "2012-05-24T00:00:00.000Z"
  			}
  		}
  		{
  			"measurement_begin": {
  				"$gte": "2012-06-23T00:00:00.000Z"
  				"$lt": "2012-06-24T00:00:00.000Z"
  			}
  		}]
  
negative.code: {
  	"AoMeasurement": {
  		"measurement_begin": {
  			"$between": ["2012-04-23T00:00:00.000Z", "2012-04-24T00:00:00.000Z"]
  		}
  	}
  }
  