Which concept relates to the classification of a new document that combines multiple elements of information?

The classification of a new document that combines multiple elements of information is accurately described by the concept of classification by compilation. This process recognizes that when various pieces of classified information are brought together into a single document, the overall classification level of the new document may be impacted.

In essence, compiling information from different sources means that the classification of the individual components needs to be evaluated collectively. If the combined data includes classified information at various levels, the new document must be classified at an appropriate level that reflects the sensitivity of the aggregated content. This ensures that any sensitive or classified details are adequately protected and this practice is crucial for maintaining the integrity of national security and sensitive information management.

Other concepts such as classification by disclosure or context may pertain to different aspects of how information is treated or understood but do not directly address the specific concept of merging multiple pieces of classified information into a new document. Classification by addition typically refers to adding new content to existing classified materials rather than the compilation of separate pieces of information.