As described the path (project and any folders) is exported with a document or document revision as well as all include documents and other components with their paths used in the document (revision). In short, a document (revision) is exported in such a way that an ITP Model can be (re) created from it.
Several situations can be encountered during import:
The exported path doesn't exist in the importing ITP/MDK Repository. Upon import the path will be reconstructed in the importing ITP/MDK Repository. If a document Revision is imported the path is created and in it a document with the imported revision as its 'current' revision.
The exported path does exist but the document itself does not exist in the importing ITP/MDK Repository. Upon import the document is placed in its location in the path. If a document revision is imported a document is created with the same name as the revision and the exported revision is made its 'current' revision.
The exported path does exist and the document or revision name exists in the importing ITP/MDK Repository.
The document will be replaced by the version in the import file. The revision in the import file will be added to the document, unless they are the same as those already present.