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 |