Structured data types

This section describes the structured data types which make up OS MasterMap Water Network Layer. The attributes associated with the data types are listed on the following two pages. The following information is given for each attribute.

Structured data type attribute information

Name and Definition

The name of the attribute and what it is describing.

Data type

The nature of the attribute, for example, a numeric value or a code list value.

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.

• ‘0..1’ – population is optional but a maximum of one attribute will be returned. These values may be used in combination.