The content may change over time which means that obsolescence information must be available.
- The metadata content URL is equivalent to a PID
- The DOI pointing the to metadata is equivalent to a SID
#1 Updated by Dave Vieglais about 4 years ago
As I understand things, the DOI represents the resource, and the metadata
record describes that resource. The identifier for the metadata records is
the gmd:fileIdentifier in the ISO metadata. A new version of the resource
would get a new DOI and a new metadata record. If the metadata content is
updated (typically to improve or correct content in the metadata) the
metadata record gmd:date is updated, but the records keeps the same
gmd:fileIdentifier. Metadata records do not get DOIs. Harvesters are
expected to use the gmd:fileIdentifier to determine if they already have the
records, and the gmd:date to determin if they need to update their existing
index from the updated record.