Properties
Properties have the following attributes:
Display name | User-specified name that identifies the property |
|---|---|
Description | User-specified description of the property |
Type | User-specified property type (alphanumeric string, integer, or floating point number) |
Length | User-specified length of an alphanumeric value |
Internal name | Generated by CDB BDE |
Database column name | Generated by CDB BDE |
In the underlying RDBMS database that contains Capacity Database Web Services data, object classes are represented by static tables that contain object instances. Relations are represented by dynamic tables that contain individual object instance characteristics (or metrics) associated with particular time intervals. Properties are represented by RDBMS table columns.
Some properties are key properties. A combination of the key properties of an object class uniquely identifies an individual object instance. A combination of the key properties of a relation uniquely identifies object instances and their time interval. Both object classes and relations must have at least one key property.
Some key properties of a relation are references. A reference property uniquely identifies an instance of a particular object class. A relation always has an interval reference property. This property is created automatically when you create a new relation.