anchor.diff:  
   Queries using these constructs will be transformed into equivalent native MongoDB queries.
   
  +[NOTE]
  +====
  +Let us know <<ogm-howtocontribute,by opening an issue or sending an email>>
  +what query you wish to execute.
  +Expanding our support in this area is high on our priority list.
  +====
  +
   ==== Native MongoDB queries
   
   Hibernate OGM also supports certain forms of native queries for MongoDB.
  
positive.code: ====
  Hibernate OGM always store identifiers using the +_id+ field of a MongoDB document ignoring
  the name of the property in the entity.
  ====
  
  An identifier type may be one of the <<mongodb-built-in-types,built-in types>>
  
negative.code: Each property or more precisely column is represented by a field in this document,
  the field name being the column name.
  
  Hibernate OGM supports by default the following property types:
  
  * [classname]+java.lang.String+
  
  