Table 6.65—DRM_Connected_Feature_Edge
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Property |
Description |
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Superclass |
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Class |
· <DRM Connected Feature Edge> |
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Subclass |
· none |
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Definition |
The one-directional topological relationship between a <DRM Feature Node> and the ordered set of ordered collections of <DRM Feature Edge>s that are connected to it within a given topological surface; that is, those that have the <DRM Feature Node> instance as an endpoint and lie in a common topological surface. If a <DRM Feature Node> instance is the endpoint of a <DRM Feature Edge> instance, it is required to have a <DRM Connected Feature Edge> component which associates to that . If, however, a <DRM Feature Node> instance is not the endpoint of any <DRM Feature Edge>, it shall not have a <DRM Connected Feature Edge> component. At feature topology levels 0 through 3, all of the <DRM Feature Edge> instances connected to a <DRM Feature Node> lie in the same topological surface, so that they shall be ordered around the <DRM Feature Node> via a single <DRM Connected Feature Edge> instance. At feature topology level 4, <DRM Feature Edge> instances can connect to <DRM Feature Node> from any direction in 3-dimensional space, such that the <DRM Feature Edge> instances may be located in different topological surfaces. In this case, the <DRM Feature Edge>s shall be organized into subsets, one for each separate topological surface, so that the <DRM Feature Node> instance has a separate <DRM Connected Feature Edge> component for each such subset. |
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Example(s) |
· A <DRM Feature Node> that represents a four-way road intersection has a <DRM Connected Feature Edge> component, which is associated with each of the four <DRM Feature Edge>s that represent the road segments that meet at the intersection. Conversely, each of those four <DRM Feature Edge> is associated to the <DRM Connected Feature Edge>, as either its starting or ending node.
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Inherited field elements |
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Field elements |
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Associated to (one-way) (inherited) |
· none |
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Associated to (one-way) |
· one or more {ordered} <DRM Feature Edge>s through <DRM Edge Direction>s |
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Associated by (one-way) (inherited) |
· none |
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Associated by (one-way) |
· none |
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Associated with (two-way) (inherited) |
· none |
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Associated with (two-way) |
· none |
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Composed of (two-way) (inherited) |
· none |
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Composed of (two-way) |
· none |
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Composed of (two-way metadata) (inherited) |
· none |
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Composed of (two-way metadata) |
· none |
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Component of (two-way) (inherited) |
· none |
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Component of (two-way) |
· one <DRM Feature Node> |
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Constraints |
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Notes |
none |
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Class diagram |
