Document Hierarchy Diagrams
Key to the Near & Far Diagrams
Element Occurrences
Required | |
Optional. May occur zero or one times. | |
Required, repeatable. May occur one or more times. | |
Optional, repeatable. May occur zero or more times. |
Additional Symbols Associated with Elements
Element content is expanded elsewhere in the diagram. | |
The element has attributes. | |
One or more elements collapsed for clarity | |
Element is the root element of the model. | |
Text, numbers, and special characters |
Grouping Elements
Required sequence: Element1 followed by Element2 followed by Element3 | |
Choice of sequence: Element1 or Element2 or Element3 |
Compound Examples
Zero or more repetitions of Element1 or Element2 or Element3 followed by zero or one occurrences of Element4 | |
Zero or one occurrences of either Element1 followed by Element2 followed by Element3 or one or more occurrences of Element4 | |
Either one or more repetitions of Element1 followed by Element2 or one or more occurrences of Element4 |