The physical and logical structure of the AIP is described in the METS structMap section . The Structural Map in the METS lists the directories and files as they are laid out. A logical structmap describes a relationship between objects in an Archivematica AIP that might not be true to their ‘physical’ layout on disk

The files transferred to Archivematica may have a coherent hierarchical or logical structure (e.g. sections of a book or parts of an audio file) that has already been described in a METS structural map. Users can import these by including a file called mets_structmap.xml in their transfer’s metadata directory. The files referenced in this structural map should be included in the transfer’s objects directory.