The ListIdentifiersRequest retrieves the headers for all records in the repository.
The request requires a metadataPrefix that tells the repository what data format to use as a result. In effect, the repository will return only the records that support the requested data format.
Optionally, the client can limit the output to records created within a certain time by using start and end timestamps. Also, by using sets the output can be limited to records that belong to certain sets.
When working on large result set the client can issue a resumptionToken which tells the repository where to start in the result set.
Given a ListIdentifiersRequest, the Request will return a valid XML builder.
Given a ListIdentifiersRequest for a record in DDI format, the Request will return a valid XML builder