/usr/share/dx/samples/data/Polylines.dx is in dxsamples 4.4.0-3.
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# Example of polylines and edges components.
#
#
# Positions array. These are a list of all the verticies of the object;
# no particular order is required here.
#
object "position list" class array type float rank 1 shape 2 items 11
data follows
0.333985 0.812452 # point number 0
0.300626 0.727407 # point number 1
0.532733 0.076484 # point number 2
0.823806 -0.404777 # point number 3
0.475019 0.496258 # point number 4
0.345888 0.328927 # point number 5
0.415428 0.758889 # point number 6
0.68152 -0.851137 # point number 7
0.44636 0.652248 # point number 8
0.729132 0.416679 # point number 9
0.935709 0.190524 # point number 10
#
# Edges array. This is a list of connected points, by point number. All
# the edges associated with a particular polyline need to be listed together.
object "edge list" class array type int rank 0 items 11 data follows
0 4 2 3 # edge point index 0
1 5 7 # edge point index 4
6 8 9 10 # edge point index 7
attribute "ref" string "positions"
#
# polylines array. This is a list of connected edges, by edge number. Each
# number is the edge index of where the next polyline starts.
object "polyline list" class array type int rank 0 items 3 data follows
0 # polyline index 0
4 # 1
7 # 2
attribute "ref" string "edges"
#
# data array. Dependent on polylines
#
object "data" class array type float rank 0 items 3 data follows
0 2.5 1.2
attribute "dep" string "polylines"
#
#
# Field definition to put the arrays together.
#
object "map" class field
component "positions" "position list"
component "edges" "edge list"
component "polylines" "polyline list"
component "data" "data"
end
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