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1. An ObjectClass is contained by only one schema
2. A schema caan contains 0 to N ObjectClass
3. An ObjectClass may have one or more superior
4. An ObjectClass may be the superior of one or more ObjectClass
5. An ObjectClass has only one OID
6. An ObjectClass has 0 to N mandatory AttributeType
7. An ObjectClass has 0 to N authorized AttributeType
8. An AttributeType is included in one or more ObjectClass
9. An ObjectClass may have more than on name
10. A name uniquely identify an ObjectClass

We have two kinds of axccess to an ObjectClass : in the server, we access an ObjectClass either by its OID or by one of its name. From an administrator GUI, we may start with  the schema.

AttributeType's relations

AttributeTypes are used to characterize entry's attributes. They contain information about comparizon rules, ordering rules, and such.

1. An AttributesType is contained by only one schema
2. An OID is associated with N ObjectClass name
3. An OID is associated with N AttributesType name
4. A ObjectClass name is associated with only one OID
5. A AttributesType name is associated with only one OID
6. An ObjectClass name has only one OID
7. An AttributesType name has only one OID
8. An OID is associated with only one ObjectClass
9. ... (To be continued)

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