The angle between the geographic meridian and the local magnetic meridian. By convention, the angle is measured with positive degrees to the east and negative degrees to the west of the geographic meridian.

other_spatial_object (O, K, I: other_spatial_object(property))

Each pty_magnetic_declination may be a property of one other_spatial_object. Inherited from property.


earth_surface_point (O, K: earth_surface_point(pty_magnetic_declination))

Each pty_magnetic_declination may be a property of one earth_surface_point.


activity (O, K, I: activity(process_data))

Defines the activity which created this instance. Each pty_magnetic_declination may be the result of one activity. Inherited from process_data.


data_value (M: ndt_plane_angle)

The value of magnetic declination.


preferred_flag (O, I: ndt_boolean) (1047)

The flag is set to True if this instance of property is the preferred value in this data store of this type of property for the object which this property describes. Inherited from property.


data_collection (I, V: SET[0:?] data_collection(collection_content))

Indicates the data collections that include this instance of E and P data. Each pty_magnetic_declination may be a member of one or more data_collection. Inherited from e_and_p_data.


graphical_element (I, V: SET[0:?] graphical_element(depicted_object))

Specifies one or more graphical elements which are depicting this data item. Each pty_magnetic_declination may be depicted by one or more graphical_element. Inherited from e_and_p_data.


process_data_item (I, V: SET[0:?] process_data_item(process_data))

Defines where this data was used by an activity. Each pty_magnetic_declination may be the value for one or more process_data_item. Inherited from process_data.

Local rules:

Uniqueness Constraint
other_spatial_object, earth_surface_point, activity
[I: property] Mandatory Relationship Set
Each PROPERTY must "be a property of" one object.
Supertype path(s):
process_data > property > pty_magnetic_declination.
e_and_p_data > property > pty_magnetic_declination.

Entity projects as table P_MAGNETIC_DECL.