Schema

• Set of rules that describes what kind of data is stored
• Helps maintain consistancy and quality of data
• Reduces duplication of data
• Ensures applications have consistant interface to the 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