Currently, the discriminator is only going to get published without referencing the base class' discriminator. This provides certain problems when a 3 level hierarchy is setup as below:

Animal -> (no discriminator)

• Cat -> "Cat"

• Tiger -> "Tiger"
• Lion -> "Lion"

• Dog -> "Dog"

• Wolf -> "Wolf"

Currently, I cannot get all the Cats without a lot of work. In instead, we maintain the hierarchy of the classes in the discriminator, then we can search for

and get back Tigers, Lions, and SuperLions.

Animal -> (no discriminator)

• Cat -> "Cat"

• Tiger -> ["Cat", "Tiger"]
• Lion -> ["Cat", "Lion"]
  ~ SuperLion -> ["Cat", "Lion", "SuperLion"]

• Dog -> "Dog"

• Wolf -> ["Dog, "Wolf"]

In addition, this change would be in line with the current way inheritance is handled in the mongodb-csharp driver. You can view the wiki link here: http://github.com/mongodb-csharp/mongodb-csharp/wiki/Inheritance