!!! Overview
[{$pagename}] generally holds the [schema]!! [{$pagename}] [Microsoft Active Directory]
[{$pagename}] that contains the classSchema and [attributeSchema] objects that define the types of [ObjectClasses] that can exist in the [Microsoft Active Directory] [forest|AD Forest]. 
All [Domain Controllers] in an [AD Forest] has a replica of the same [{$pagename}]. All modifications to the [{$pagename}] is performed by the [Schema Master FSMO Role]

!! [eDirectory]
The Schema Partition The Schema partition keeps track of all the object class and attribute definition information for the server. 

This information is synchronized between servers, using a process called Schema Skulk or Schema Sync, and it means that each server has a complete copy of the schema. 

The [Schema Sync] process starts with the server that contains the [Master Replica] of the [Partition Root Entry] and propagates to the other servers with a copy of [Partition Root Entry]. Then it continues with the servers in the child partitions, until all servers have received a copy of the schema. 

The [Partition ID] of the Schema partition is always 1.

!! More Information
There might be more information for this subject on one of the following:
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