Schema:
* Set of rules that describes what kind of data is stored
* Helps maintain consistancy and quality of data
* Reduces duplication of data
* Object class attribute determines schema rules the entry must follow
* Schema contains the following:
Required attributes
Allowed attributes
How to compare attributes
Limit what the attributes can store - ie, restrict to integer etc
Restrict what information is stored - ie, stops duplication etc
There are Schemas available for various kinds of Directories.
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