ISO/IEC 18023-1:200x(E) — Table 6.70 DRM_Environment

Table 6.70 — DRM_Environment_Root

Property

Description

Class

<DRM Environment Root>

Superclass

<DRM SEDRIS Abstract Base>

Subclass

None.

Definition

An instance of this DRM class is the aggregating object for the <DRM Feature Hierarchy> and / or <DRM Geometry Hierarchy> that represent the instantiation of a collection of all data in a common SRF in a given transmittal. In other words, an <DRM Environment Root> instance is the starting point for all objects in the same SRF in a transmittal.

The srf_info field specifies the SRF within which the given <DRM Environment Root> instance is defined.

Clarifications

¹ These components are present only if they differ from the <DRM Base Time Data> of the given <DRM Environment Root> instance’s <DRM Transmittal Root> aggregate.

² The presence of these components depends on the <DRM Feature Hierarchy> and <DRM Geometry Hierarchy> components. See Hierarchy summary constraints for details.

³ If present, this provides access to all <DRM Variable> instances defined within the scope of the given <DRM Environment Root> instance, if any. If there are such <DRM Variable> instances, an <DRM Interface Template> shall be present; otherwise, it shall not be present.

⁴ This specifies the spatial extent of the given <DRM Environment Root> instance, defining the maximum spatial extents of the component objects.

Class diagram

Figure 6.81 — DRM_Environment_Root

Inherited field elements

Field name	Range	Field data type
None

Field elements

Field name	Range	Field data type
srf_info		SRF_Info

Associated to (one-way) (inherited)

None.

Associated to (one-way)

None.

Associated by (one-way) (inherited)

None.

Associated by (one-way)

None.

Associated with (two-way) (inherited)

None.

Associated with (two-way)

None.

Composed of (two-way) (inherited)

None.

Composed of (two-way)

zero or more <DRM Base Time Data> instances¹
zero or one <DRM Feature Hierarchy> instance
zero or one <DRM Geometry Hierarchy> instance
a bounded set of 0..2 <DRM Hierarchy Summary Item> instances²
zero or one <DRM Interface Template> instance³
zero or more <DRM Primitive Summary Item> instances
one <DRM Spatial Extent> instance⁴

Composed of (two-way metadata) (inherited)

None.

Composed of (two-way metadata)

zero or one <DRM Access> instance
zero or one <DRM Citation> instance
zero or more <DRM Cross Reference> instances
zero or one <DRM Data Quality> instance
zero or one <DRM Description> instance

Component of (two-way) (inherited)

None.

Component of (two-way)

one <DRM Transmittal Root> instance

Constraints

Example(s)

Earth.
An area of North America that straddles two UTM zones. The <DRM Transmittal Root> would have two <DRM Environment Root> components, one for each of the two UTM zones.