Lane Point Attributes consist of selected meta data about a segment (a set of two of more points) along a described lane.
That is, the stated value is enabled (that is; set to be true, false, or given a new value) from the starting point in the path of the geometric span of the lane until the either the ending (last) point of the geometric span of the lane, or until another point disabled the value.
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Lane Segment Attributes
See also: this article about Lane Point Attributes