Feature types

This section describes the two features available in the OS Open Rivers product. The attributes associated with these feature types are listed below along with a brief description of their data properties.

Feature type attribute information

Name and Definition

The name of the attribute and what it is describing.

Attribute type

The nature of the attribute, for example, a numeric value or a logical indicator.

Multiplicity

Describes how many times this element is expected to be populated in the data. An attribute may be optional or mandatory within the product. These are denoted by:

• ‘1’ – There must be a value.

• ‘2’ – There must be two values.

• ‘n’ – There may be one or more values.

• ‘0’ – Population is optional.

These values may be used in combination.

• Association – An association identifies the relationship between features. These relationships are by reference only and the value will be the identifier of the referenced feature.