The BPMN Style Sheet is available for you to examine at <installdir>/jviews-diagrammer89/data/bpmn/bpmn.css.
Any files that it refers to are in the same directory. It defines
the appearances and behavior of the BPMN objects. In addition to
the definition of graphic properties for the objects (such as
foreground color, line width), the style sheet defines the
structure of the graphic objects. The nodes of the graph are
represented by composite graphics, and the composition of these
objects is specified in the style sheet.
The following code example shows the style rule that sets the foreground color of
the Intermediate Events to blue.
A style rule that sets a property value
#intermediate {
foreground : "blue";
}
The BPMN Style Sheet is also in a JAR file;
in fact, the BPMN Modeler sample makes use of the style sheet in
the JAR file.