ocr: Technique Chen Trident Reiner/Teorey Tool Chen Excelerator MacFlow with. ADW ADW Symbol Sampler 1:1 PHDE spest - - : 1:N PHODH M:N M N - 10-0CHH FIGURE 4 Different approaches to representing cardinality. Note that Chen and Reiner use a diamond to represent a relationship, while the Trident approach uses a line.