System Metadata (HashStore)

[doulikecookiedough]

Format Metadata

Provide the standard metadata for the proposed format, ensuring that the id and name are unique and appropriate to the version of the format being proposed.

• formatId: http://ns.dataone.org/service/types/v2.0:SystemMetadata
• formatName: System Metadata (HashStore)
• formatType: METADATA
• mediaType: text/xml
• extension: None

Format description

With the Metacat back-end storage refactor, we will need a new metadata format to represent the metadata that corresponds to each data object in the HashStore. Development is ongoing and this issue should be updated as discussions take place and progress is made.

Specification / Namespace documentation

The format will be defined at http://ns.dataone.org/service/types/v2.0:SystemMetadata.

Checklist

• [x] The format is not a duplicate of another in the list under a different name or identifier
• [x] Format Identifier is unique
• [ ] Format identifier is the commonly-used identifier for the namespace, or the best URI for the namespace, or the best Media type
• [ ] Format identifier is same as the MIME media type if the mime type is specific to only this format (e.g., image/png is specific to one format, whereas text/xml is not specific to one format)
• [x] Format Name is recognizable and sensible
• [ ] Format includes version info where applicable in formatName and formatId
• [x] formatType is the correct type from the values: DATA, METADATA, or RESOURCE
• [ ] MediaType is the most specific MIME media type that applies to the format

Considerations

• Need to confirm the mediaType. As of writing this issue, I believe that this metadata will be an .xml document.
• Need to confirm the formatName - is System Metadata (HashStore) ok?
• First time working with object-formats, and am likely missing a few items, but would like to get the process started to get this new format added.

[mbjones]

The proposed formatID does not resolve to the schema. How about using a fragment id instead, so that it resolves? In addition, there is nothing specific about this format for HashStore -- so I recommend we remove all signs of that. The media type text/xml is fine, as defined in RFC 7303. Finally, the extension for xml files is generally xml. So I propose:

• formatId: https://ns.dataone.org/service/types/v2.0#SystemMetadata
• formatName: System Metadata
• formatType: METADATA
• mediaType: text/xml
• extension: xml

[doulikecookiedough]

Thank you @mbjones and @taojing2002 for helping to resolve/address this issue!