Relationships

A Relationship can exist between Features, but not between Attributes. The GDF catalogue pre-defines a number of feature relationships. Relationships are identified by 4-digit codes. GDF allows user-defined relationships as 4-digit codes beginning with "9000".

Note: As with Feature Codes, "9000" to "9999" are TomTom^®-defined Relationship Codes. No Feature Code values are repeated as Relationship Code values, i.e., all "9000" to "9999" codes are unique.

GDF RELATIONSHIP CODE	RELATIONSHIP NAME	FEATURES INVOLVED
1001	Road Element in Aministrative Area	Order 8 Area; Road Element

Example of a TomTom-Defined Relationship:

RELATIONSHIP CODE	RELATIONSHIP NAME	FEATURES INVOLVED
9501	Road Element in Order 9 Area	Order 9 Aera; Road Element

Note: Features involved in a Relationship are sometimes referred to as "Partners."

Note: Relationship records show full feature reference (GDF Datasets, GDF Section ID, and GDF Feature ID.

Please see Theme 11: Relationships in the MultiNet Data Specifications and Data Model document for details.

For a list of relationship names and codes, refer to the allcodes database included in your data delivery.

AN IMPORTANT NOTE CONCERNING POI RELATIONSHIPS:

The only Relationships available involving Services are ones where both partners are available in standard MultiNet.

Example: The Service Belonging To Service Relationship is available for Airports and Airline Accesses (Access Gateway) since both Services are available in the standard MultiNet product.

If one of the features of the Relationship is only defined in the MultiNet POI enhancement product, then all its relationships are defined in the MN POI enhancement product only.

Example: 1: The Service in Order 8 Area Relationship involving Shops is only available in the MultiNet POI product because only one partner (Order 8 Area) is available in the standard MultiNet product.

Example: 2: The Service in Order 8 Area Relationship involving Railway Stations is available in the standard MultiNet product.

See the MultiNet Data Specifications and Data Model document for more details.

Relationships

Example of a GDF-Defined Relationship:

Example of a TomTom-Defined Relationship: