Answer to Question 1
In IDEF1X, nonidentifying connection relationships have a default cardinality of one-to-many, with a mandatory parent and optional child. This is represented by placing a filled-in circle by the child. The same notation is the default for identifying connection relationships. Nonspecific relationships place a filled-in circle at each end of the connecting line, but there is no way to indicate a minimum cardinality. Additional symbology that may be used is a diamond next to the parent to indicate that it is optional, a P to indicate one-or-more, and a Z to indicate zero-or-one.
Answer to Question 2
In IDEF1X, nonidentifying connection relationships are drawn as dashed lines. Identifying connection relationships are drawn as solid lines, as are nonspecific relationships.
The structure of climate diagrams.
Conventional symbols used in pedigrees - Genetics
The fossil record of chimpanzees is sparse. The femur from Kikongo, Uganda (c) may represent a late
Example of a family genogram with accompanying legend (symbols used in genograms).
Common Abbreviations and Symbols Used by Massage Therapists Cont.
Common Abbreviations and Symbols Used by Massage Therapists Cont