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Table 2 A comparison of the essential features of Methods 1–3

From: Standards-based metadata procedures for retrieving data for display or mining utilizing persistent (data-DOI) identifiers

  Method 1 Method 2 Method 3
Persistent identifer handle DOI (DataCite) DOI (DataCite)
Resolution mechanism(s) locatt query or xml-processing via script or content negotiation Content negotiation xml-processing via script
Number of HTTP GET requests for file retrieval 2 2a 3a
Metadata standards 10320/loc DataCite schema, OAI-ORE, METS
  1. aFor requests made directly to A request via requires an additional HTTP request.