Which of the following is the definition of metadata?

The definition of metadata accurately describes it as "data about the data." This encompasses various attributes associated with a file or piece of information, providing context and additional details beyond the content itself. For example, in the realm of digital files, metadata can include elements like the creation date and time, the size of the file, the last modified date, and even specific file header information. This contextual data is crucial in digital forensics as it helps investigators understand the history and provenance of a file, contributing to an accurate analysis of evidence.

Understanding metadata is essential for identifying when a document was created, how it has been altered over time, and if it's been accessed incorrectly. This background is vital in investigations, helping to establish timelines or the authenticity of data. The other concepts presented in the choices focus on other aspects of digital forensics or data management but do not encapsulate the broad scope and definition of metadata as described here.