Table 6.103 — DRM_Hierarchy_Summary_Item
Property |
Description |
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Class |
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Superclass |
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Subclass |
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Definition |
An instance of this DRM class represents an instance, or a number of identical instances, of a <DRM Geometry Hierarchy> instance or <DRM Feature Hierarchy> instance that exists within the given <DRM Model> instance or <DRM Environment Root> instance. <DRM Hierarchy Summary Item> instances are combined together to form hierarchies that mirror those that they summarize. This summary is a compressed form of the actual hierarchy, as each <DRM Hierarchy Summary Item> instance may represent a number of instances of the class indicated by its drm_class field. The multiplicity field records how many instances of the given class a <DRM Hierarchy Summary Item> instance actually represents. All instances represented by one <DRM Hierarchy Summary Item> instance shall have exactly the same hierarchical pattern beneath them, right down to where the hierarchy summary concludes. A <DRM Hierarchy Summary Item> instance represents both the instance(s) that it describes, and the specific hierarchy beneath it. It may have an optional association to the <DRM Geometry Hierarchy> instance(s) or <DRM Feature Hierarchy> instance(s) that it summarizes. Each <DRM Hierarchy Summary Item> instance can optionally have a list of <DRM EDCS Use Summary Item> components giving the classifications that are attached to those instances in the transmittal being summarized. The hierarchy summary does not have to be a total representation of the entire transmittal hierarchy and can be limited to a useful high level summary. If the producer of the transmittal being summarized deems it of potential use to consumers, the branches of the hierarchy summary can terminate with a list of <DRM DRM Class Summary Item> components representing the DRM objects beneath that point in the hierarchy. The multiplicity_meaning field specifies the meaning of the multiplicity field value for the <DRM Hierarchy Summary Item> instance. The multiplicity field specifies the number of identical instances represented, or the order of magnitude of that number, for the <DRM Hierarchy Summary Item> instance. If the multiplicity is unknown, the value of this field shall be set to zero. |
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Class diagram |
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Inherited field elements |
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Field elements |
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Default field values |
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Associated to (one-way) (inherited) |
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Associated to (one-way) |
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Associated by (one-way) (inherited) |
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Associated by (one-way) |
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Associated with (two-way) (inherited) |
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Associated with (two-way) |
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Composed of (two-way) (inherited) |
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Composed of (two-way) |
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Composed of (two-way metadata) (inherited) |
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Composed of (two-way metadata) |
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Component of (two-way) (inherited) |
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Component of (two-way) |
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Constraints |
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Clarifications |
1If present, the association(s) to <DRM Feature Hierarchy> instances indicate that the <DRM Hierarchy Summary Item> instance summarizes the specific <DRM Feature Hierarchy> object tree(s) thus indicated. 2If present, the association(s) to <DRM Geometry Hierarchy> instances indicate that the <DRM Hierarchy Summary Item> instance summarizes the specific <DRM Geometry Hierarchy> object tree(s) thus indicated. 3If present, the <DRM DRM Class Summary Item> components of a <DRM Hierarchy Summary Item> instance list classes for which instances occur beneath this point in the hierarchy being summarized. 4If present, the <DRM Hierarchy Summary Item> components of a <DRM Hierarchy Summary Item> instance summarize the next level down in the component tree of the hierarchy being summarized. 5If present, the list of <DRM EDCS Use Summary Item> components of a <DRM Base Summary Item> instance summarize EDCS usage by instances of the class specified by drm_class that occur somewhere in the scope being summarized. |
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Example(s) |
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