An issue was reported by stakeholders concerning requirement CSIPSTR2:
CSIPSTR2: The Information Package root folder SHOULD be named with the ID or name of the Information Package, that is the value of the package METS.xml's root `<mets>` element's `@OBJID` attribute.
Enforcing that the name must be the same as the attribute may cause file system interoperability issues because certain characters used in identifiers may cause errors in specific file systems.
There is a need to make sure that the translation of the packages' identifier into a file or folder name is conformant with constraints in different types of commonly used file systems, such as NTFS or FAT32 on Windows, Ext4 or XFS on Linux etc.
Our recommendation is to use Kunze's section 3 of the pair tree specification as the starting point: