| Metadata is data about data, the basis of revealing and use of digital resources. Dublin Core Metadata as a common metadata standard is the most influential international metadata format. With the application of DC metadata changes in the environment, on the one hand, the original simple Dublin Core metadata set has been unable to meet the new application environment, unlimited expansion of Dublin Core Metadata Set will increase the maintenance costs and difficult to manage; on the other hand, with the development of Semantic Web technology, since different areas, even in the same field, have multiple metadata formats, so they will exist metadata interoperability. Therefore, DC metadata standard system can not meet the needs of the times.With the DCMI concern the relationship between the Semantic Web and metadata, attention metadata interoperability and open metadata service, As the 2007 Singapore Framework was proposed, DC 2.0 standard specification system was Improved.Meeting of the early DC metadata applications grammar and structure,96 years Warwick framework proposed application as a general metadata "containers" and the conceptual framework, on March 97 meeting to determine the limited edition DC,that defined and extended three aspects:the elements of the DC Language description, model system and the attribute types. in 2003 DCMI began to discuss Abstract Model, Abstract Model clearly defines the concepts, terminology,vocabulary and their relations,and the basic structure of records. from the past sessions of the DC annual International Conference of view, DCMI has been exploring how to better describe digital resources, how to better achieve the semantic interoperability of metadata and other issues.In 2007 DCMI Propose the "Singapore Framework" that is DC Metadata Application Profile for the application design metadata framework to help design the greatest degree of metadata interoperability, and through this Such a framework makes the design of the document to be reused as much as possible.Singapore framework defines a series describing components, describes the relationship the components of these descriptions are based on standard specifications and standard applications and domain model based on the Semantic Web.Singapore proposed a complete framework, provides a good theoretical basis to for the standardization of metadata application framework, solve what the metadata specification should include and the correlation between the various parts.In this paper, we discuss the Singapore frame and the latest research progress in the framework of the international application. Through the research of DC1.0 and DC2.0, especially concerned about the DC2007, DC2008, DC2009 metadata research and development direction, grasp the nature and characteristics of metadata, combined with participants proposed by the parties put forward their own ideas and programs,we propose the view of DC2.0 metedata specification, especially the review of Singapore Frame.Why should I give through the application of metadata framework with a clear understanding of application framework which can solve the problem, and proposes the framework of the Singapore system of DC Metadata Application Profile and abstract models of thinking and perception, but also formed a research paper how to apply metadata application.Based on the latest foreign Metadata Application Profiles Practice Project Dspace environment Dryad warehouse and SWAP project case studies, and combined with the application of metadata, application metadata on the future application of the domestic programs and present a number of meta-data system interoperability on problems made some constructive comments and Solutions. Associated data services in an open area to the Swedish National Library, "library books into the Semantic Web will" explore in depth analysis of detailed case study on metadata mapping problems, how to support the description of the major resources of each type of metadata mapping program. Metadata model for the realization of:to meet the resource description, storage, interoperability, retrieval, distributed knowledge discovery and other related components or modules of the proposed metadata model functional requirements. At the same time the framework of this system in Singapore is also a certain length of the next DC metadata in labeling the role of the community.Singapore-based framework in the final study of the meta-data services based on the present and future trends related to the future of DC metadata interoperability in digital libraries, the future of DC metadata to the library of social applications, further study Ontology-based metadata conversion and semantic relationships, technology, and content. |
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