+ A bold connector
+ Depending on the attribute "is_end", the value of the attributes "Start cardinality" or "End cardinality" is displayed at the beginning or at the end of the connector respectively
+ If the value of the attribute "is_end" is 1at the end of the connector an arrow is drawn

GRAPHREP
SHADOW off
PEN style:solid w:0.1cm
EDGE

AVAL w:"is_end"
FONT "Arial" h:8pt
START
PEN style:solid w:0.1cm
LINE x1:0cm y1:0cm x2:0.15cm y2:0cm
IF (w = "0")
{
ATTR "Start Cardinality" x:-0.2cm y:0.25cm w:c h:c
}


END
PEN style:solid w:0.1cm
LINE x1:0cm y1:0cm x2:0.15cm y2:0cm

IF (w = "1")
{
PEN w:0.1cm
FILL color:black
POLYGON 4 x1:0.15cm y1:0cm x2:0cm y2:-0.1cm x3:0.05cm y3:0cm x4:0cm y4:0.1cm
FONT "Arial" h:8pt
ATTR "End Cardinality" x:-0.3cm y:-0.25cm w:c h:c
}