- digraph
- edge
- node
- subgraph
- URL
- arrowhead
- arrowsize
- arrowtail
- bgcolor
- center
- color
- constraint
- decorateP
- dir
- distortion
- fillcolor
- fontcolor
- fontname
- fontsize
- headclip
- headlabel
- height
- label
- labelangle
- labeldistance
- labelfontcolor
- labelfontname
- labelfontsize
- layer
- layers
- margin
- mclimit
- minlen
- name
- nodesep
- nslimit
- ordering
- orientation
- page
- pagedir
- peripheries
- port_label_distance
- rank
- rankdir
- ranksep
- ratio
- regular
- rotate
- samehead
- sametail
- shape
- shapefile
- sides
- size
- skew
- style
- tailclip
- taillabel
- weight
- width