anchor.diff:  It is also possible to combine __-i__ and __-n__ options, such as:
   
   ```
  -mongo-connector -v -m localhost:27017 -t http://localhost:7474/db/data -d neo4j_doc_manager -n test.talks -i room
  +mongo-connector -m localhost:27017 -t http://localhost:7474/db/data -d neo4j_doc_manager -n test.talks -i room
   ```
   
   Important: All nodes will always have the **_id** property.
  
positive.code: 
  Just a remainder, you can only specify the fields of the root document and the direct nested documents that will be imported. 
  
  
negative.code: We can filter the **fields** that will be imported specifying the command line parameter __-i__. For example, we can import only __room__ field:
  
  ```
  mongo-connector -m localhost:27017 -t http://localhost:7474/db/data -d neo4j_doc_manager -i room
  ```
  
  For this example, __timeslot__ would not be imported. It is also possible to specify multiple values:
  
  ```
  mongo-connector -m localhost:27017 -t http://localhost:7474/db/data -d neo4j_doc_manager -i room,timeslot,title
  ```
  
  If the specified field does not exist, only the existing ones will be imported. In the example, only __room__ and __timeslot__ will be imported.
  