LineSegments specifies a list of segments related to a specific line. Two list of segments are provided -
all. A segment is a path between 2 adjacent stations on a line. See PathSeg for more details
main - The main sequence of segments composing a line. The main segment represents that part of the line which has the most frequent number of runs in a day.
all - Unorderd list of all segments of the line.
|seg_ids||Yes||ID||List of PathSeg@id or RefPathSeg@id elements.|
|type||Yes||LineSegmentsType||Possible values are either "main" or "all".|