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n. ~ The quality of being unchanging.


The content of a document is fixed in that it is stable and resists change, but it may not be immutable. Words may be erased or added. 'Immutability' connotes a significantly greater resistance to change, such that any change is clearly evident. In information technology, immutability is accomplished by creating a process to demonstrate that the record has not been altered.

(OCLC/RLG Preservation Metadata 2001, p. 4) Digital objects are not immutable therefore, the change history of the object must be maintained over time to ensure its authenticity and integrity.