Extending the Dublin Core
- Does allow for extensibility
- but tension between extending DC and choosing other, richer schema
- greater specificity = lesser interoperability?
- Improve semantic precision of DC elements using qualifiers
- element refinements
- make the meaning of an element narrower
- value encoding schemes
- specify that value is from controlled vocabulary, or formatted in a standard way
- The “dumb-down” principle
- Dublin Core Qualifiers recommendation 2000