Data glossary

• Data modelling terms
  • Data elements
    • From the data flow lines it is possible to identify the data elements (items).
  • Data exclusivity
    • Ensuring equal values represent the same entity (Exclusivity)
  • Data keys
    • Identify Primary and Secondary Keys (Involution)
  • Data relationships
    • Define Relationships (Cardinality)
      • 1-1
      • 1-Many
      • Many-1
      • Many-Many
      • or Many
      • 0 or Many to One
  • Data stores
    • Entities or fields
  • Referential integrity (Optionality of Association)
    • References from one table to another are valid and accurate

[Rev: 04/02/99] © 4/2/1999 V/2-Com (Verhaart), P O Box 8415, Havelock North, New Zealand.