Proposed Dublin Core Qualifiers

• Subject:

  
  

• LCC (Library of Congress Classification)

• LCSH (Library of Congress Subject Headings)

• NLM (National Library of Medicine Classification)

• MeSH (Medical Subject Headings

• Identifier:

  
  

• (URL is default)

• URN (Uniform Resource Name)

• ISBN (International Standard Book Number)

• ISSN (International Standard Serial Number)

• SICI (Serial Item and Contribution Identifier)

• SCHEME:
  
  • a formal data content standard to refine the meaning of an element’s data, for example:
    

• Source: Rebecca Guenther, The Qualifiers Proposal (http://www.loc.gov/marc/dcqualif.html)