tailieunhanh - eknowledge transformation phần 6

Siêu dữ liệu cho biết thêm mô tả, kỹ thuật, đã administrati, và giá trị cấu trúc dữ liệu và thông tin. Siêu dữ liệu hỗ trợ trong phân nhóm thông tin liên quan đến tái sou rc es và trong việc cung cấp năng lực thông tin "chunking" tái sử dụng dễ dàng, rability interope, giao dịch, lưu trữ, và p lại se rvation. | Technologies Standards and Marketplaces for e-Knowledge The web is a serious commitment to common meanings. Tim Berners-Lee Metadata. This is a fundamental digital building block of the Knowledge Economy. Metadata describes knowledge objects and is used to support the indexing search discovery retrieval and use of those objects. If one thinks of the analogy of a web-based store the metadata is analogous to the online catalog of products and the knowledge objects are analogous to the products themselves. Metadata adds descriptive technical administrative and structural value to data and information. Metadata assists in clustering related information resources and in providing the capacity for chunking information for easy reuse interoperability transaction archiving and preservation. A digital object that is not enriched with metadata cannot be used effectively in contexts for which it was not designed. High-value digital repositories require well-described and organized metadata throughout the collection. Print collections can rely on a single front-cover or catalogue descriptions of content and context. Digital collections require extensive tagging that enables an e-book or journal article to be segmented into modular durable and independent chunks. The tradecraft of achieving metadata chunking in a cost-effective manner will be one of the critical emerging competencies of the e-Knowledge Industry. Metadata is about both how and what. The initial focus of working groups defining metadata standards such as the IMS Dublin Core was h ow to describe characteristics of information through metadata fields and related subcategories. The what of metadata is twofold deciding what fields among the dozens defined by these metadata s tan-dards are necessary for a particular market or application . Dublin Core and how to specifically identify the subcategories within the identified metadata fields to make sense in different markets . postsecondary education K-12 .