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 # Originals and masters

 Last update: 09.03.2026 

IDocObject is the base for all doc object functionality. It provides members for traversing the parent-child hierarchy (Children, GetChildren<T>,GetDescendants<T>,Parent,GetAncestor<T>,Root), which we have already met, and it also provides members for traversing the occurrence structure:

- Original: Gets the original IDocObject, else null if this is a master.
- Master: Gets the ultimate original, that is the DocObject master at the end of the occurrence chain. If the object is a master, the object itself is returned.
- Instance: Gets the instance that produces this occurrence, else null if this is a master.