| PD.1 | Arc with class consumption must have source reference to glyph of class and target reference to port on glyph of class |
| PD.2 | Arc with class production must have source reference to port on glyph with class and target reference to glyph of class |
| PD.1 | Arc with class consumption must have source reference to glyph of class and target reference to port on glyph of class |
| PD.2 | Arc with class production must have source reference to port on glyph with class and target reference to glyph of class |