DuraCloud™ @TDL will generate certain Technical Metadata upon ingest of materials, depending on the method of ingest.
For more about Preservation Metadata, please see the DuraCloud™ Resource page.
The following metadata is generated upon ingest of content through the DurAdmin interface.
- File name
- Mime Type
- DuraCloud “space”
- File size
- Last modified
Users can add descriptive metadata to files ingested through DurAdmin through two additional tools:
- Properties: The DurAdmin interface allows you to add value pairs to any individual file. You enter the Property Name (e.g. “Title”) and the Property Value (e.g. “Pasteur [Letter 10]”). There is no native metadata schema or standard in DuraCloud.
- Tags: You can also use tags as descriptive keywords to files.
Using DuraCloud Sync
(Published by DuraSpace under a Creative Commons Attribution-Share Alike 3.0 Unported License.)
As the Sync Tool transfers files to DuraCloud, it will attempt to capture certain types of metadata about each file, and include that information as part of the content item added to DuraCloud. The list below describes the metadata that is captured automatically. You have the option to add, update, or delete the properties of each file after it has been transferred to DuraCloud.
- Mime Type
- The content type of the file.
- As the Sync Tool transfers your files to DuraCloud, it attempts to determine the mime type of each file based on the file’s extension. If it cannot determine a mime type for a given file, that file’s type is set to “application/octet-stream”, which is a generic mime type for binary data. Select the “Edit” button on the DuraCloud web interface to change a file’s mime type.
- If you find that files with certain extensions are not being mapped as you would prefer, you can always change the value on uploaded files from within DuraCloud. If you would like to make sure that files with a given extension are given your preferred mime type during upload, you simply need to update the mapping file. The mapping of file extension to mime type is determined by a file included in your Java installation called content-types.properties. This file is usually located in the “lib” folder under your Java runtime installation directory. After making a copy of the original file as a backup, simply update it following the formatting conventions used throughout the file to include the mappings you prefer, then save the file. After making changes, you will need to re-start the Sync Tool to ensure that the changes are picked up properly.
- The space in which a content item is stored. This field cannot be edited.
- The size of a content item. This field cannot be edited.
- The date on which the file was added to DuraCloud. This value is updated when a file is added or updated.
- The MD5 checksum of the file. This field cannot be edited.
- The creator is the DuraCloud user who transferred the file into DuraCloud storage.
- Content file path
- The full path of the file in its original storage location
- Content file created
- The date when the file was created, as determined by the originating file system. This information may not be available from all file systems.
- Content file modified
- The date when the file was last modified, as determined by the originating file system. This information may not be available from all file systems.
- Content file last accessed
- The date when the file was last accessed, as determined by the originating file system. This information may not be available from all file systems.
For a complete description of these Metadata items, please visit the DuraSpace Wiki.