DCD: Basic Concepts 2/2
Attributes
- Name, is Global, Required or Optional, has ID-Role
Entities
- Name & (Value, PublicID, or SystemID)
Datatypes
- XML DTD types, numbers (int, fixed, float, 1-8 bytes), booleans, times (dates & intervals), & binary data
- Min, Max & MinExclusive, MaxExclusive
- Picture constraints on string fields (per COBOL)
- Characters, numbers, decimals, symbols