Type Alias: DiagramConnectionType

DiagramConnectionType = "parOf" | "presOf" | "presParOf" | "unknownRelationship"

ST_CxnType: what a dgm:cxn asserts. parOf (the default) is the parent/child edge of the user's tree; presOf and presParOf bind a node to the generated pres point that draws it, and are the layout engine's bookkeeping rather than structure.