Stanford Digital Repository
Issues and Challenges for future:  METS – mdRef v. mdWrap
•
•Rationale for using mdRef: 
–A separate metadata file hierarchy mirrored file hierarchy of the AIHT collection;  kept down the size of the METS document (which were HUGE)
–Provided more granularity in cases where edits or replacement of the metadata for a single file was needed
–Allowed more efficient access mechanisms provided by the filesystem instead of the slower access methods of current generation XML tools
•
•Disadvantages to export library:
–Required much more resource to process
–More difficult to manage the correlation of metadata per file with the inventory and logical and physical structures within the METS document
•