[Begginer] What is it the objectclass: nsMappingTree

[CrAzYoNi]

Hi all,
I'm new to the LDAP databases.
Currently I've got a new job, System administrator (Though at those days I'm only learning the job), I've installed Sun one directory server 5.2... & I'm reading the "Getting started guide" of SUN.

In the first example about how to create a new suffix, Mapping tree DN I should set: objectClass: nsMappingTree

I know that "top" should (and is only as optional) to be at the first level, after it comes the extensibleObject...
But what does is the meaning of the objectClass: "nsMappingTree"? I couldn't find any answers for it on the guide or with Google help.

Please help me!!

thank you in advance.

 

[CrAzYoNi]

1 more objectClass that I could not figure out its meaning is: nsBackendInstance.

Hope that you will be able to help me.

Thank you in advance.