The following custom line style results in very interesting looking pictures.
<?xml version="1.0" encoding="UTF-8"?>
<SimpleSymbolDefinition xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema" xsi:noNamespaceSchemaLocation="SymbolDefinition-1.0.0.xsd">
<Name>LongDashDotShortDashDot</Name>
<Graphics>
<Path>
<Geometry>
M -12.5,0 L -2.5,0
M 0,0 L 0,0
M 2.5,0 L 7.5,0
M 10,0 L 10,0
</Geometry>
<LineColor>ff000000</LineColor>
</Path>
</Graphics>
<LineUsage>
<VertexControl>'OverlapWrap'</VertexControl>
<Repeat>25</Repeat>
<VertexJoin>'Miter'</VertexJoin>
</LineUsage>
<ParameterDefinition/>
</SimpleSymbolDefinition>
