Distinguishes variants such as ZIP, ZIP64, ustar, pax, or GNU TAR. The variant determines how the container is decoded, which structural limits apply, and which archive features can be represented.

Records the distinct compression codecs used by archive members or an outer TAR wrapper. Archives can mix stored and compressed content, so this describes the container's payload rather than its ordinary file size.

Counts every entry in the archive's internal catalog. Unlike an ordinary file, an archive represents multiple independently named members inside one outer object.

Counts regular payload files separately from directories and other entry types. This measures how many extractable files the archive actually contains.

Counts explicit directory entries preserved in the archive. It describes the packaged internal hierarchy, which does not exist for a standalone non-container file.

Sums the logical sizes of the regular-file members. This exposes the archive's expanded storage footprint, which can be far larger than the outer container size.

Records the deepest nested member path found inside the container. It quantifies archive hierarchy and helps identify unusually complex extraction layouts.

Counts members whose names use absolute paths, drive-qualified paths, or parent traversal. Those paths can escape the intended destination during extraction, making this an archive-specific safety control.