The structure or “structural map” as it is known in METS is
determined by the physical and/or logical structure of a physical item.
Re-creating structures for books is less complicated and timeconsuming
since pages are usually numbered and chapters exist.
Much more time-consuming is the recreation of the structure of an
archival folder. Description usually only exists on the folder level, but
a structural map for a folder reaches down to the item level. How
detailed the structural map will be depends on how much description
is necessary to make the content intelligible to users.