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

Subsidiary sections:

Top level element: Article

Front Matter structures

Body and Section structures

Back Matter structures

Floating Object structures

Sub-article and Response structures

Block structures