The Dublin Core Metadata Initiative (DCMI)  began in 1995 with an invitational workshop in Dublin,
Ohio that brought together librarians, digital library researchers, content providers and text-mark-up experts to improve discovery standards
for information resources. The original Dublin Core merged as a small set of descriptors that quickly drew global interest from a wide variety
of information providers in the arts, sciences, education, business, and government sectors.
The Dublin Core is not intended to displace any other metadata standard. Rather it is intended to co-exist, often in the same resource description,
with metadata standards that offer other semantics. In fact, on one hand simplicity allows the cost of creating metadata to reduce and promotes
interoperability, while on the other hand, simplicity does not accommodate the semantic and functional richness supported by complex metadata schemes.
The Dublin Core metadata element set is a set of 15 descriptors which includes:
The design of Dublin Core consists in encouraging the use of richer metadata schemes in combination with itself.
Richer schemes can also be mapped to Dublin Core for export or for cross-system searching. On the other hand, simple Dublin Core records can
be used as a starting point for the creation of more complex descriptions.
- Name : The label assigned to the data element
- Identifier : The unique identifier assigned to the data element
- Version : The version of the data element
- Registration Authority : The entity authorised to register the data element
- Language : The language in which the data element is specified
- Definition : A statement that clearly represents the concept and essential nature of the data element
- Obligation : Indicates if the data element is required to always or sometimes be present (contain a value)
- Data-type : Indicates the type of data that can be represented in the value of the data element
- Maximum Occurrence : Indicates any limit to the repeatability of the data element
- Comment : A remark concerning the application of the data element