What concept is used to derivatively classify a new document based on changes to terms or descriptions?

The concept used to derivatively classify a new document based on changes to terms or descriptions is accurately captured by the term "Material alteration." This refers to any modification that affects the original classification of information. When the content of an existing classified document is changed—such as altering terms, descriptions, or other critical details—these changes can necessitate a new classification determination based on the updated information. This ensures that the sensitivity of the information is correctly assessed in light of the alterations made.

While "Derived classification" relates to the process of applying classification to new materials derived from previously classified information, it does not specifically address the nature of changes to the document itself. "Revealed by" is not relevant in this context as it does not pertain to the act of classifying based on modifications. "Content transformation" suggests a more general change rather than specifying the implications for classification resulting from material alterations. Therefore, the correct concept that encapsulates the idea of deriving classification from changes in terms or descriptions is indeed "Material alteration," as it emphasizes the impact of those changes on the classification status.