Microsoft MCDBA Certifications Exam 70-291

A fourth area for research 70-271 is in the development of management tools for digital libraries and archives that integrate descriptive control and maintenance with storage technologies. Dynamic digital objects, such as those found in hypertext systems, pose special management problems for both current and future retrieval and reuse. The boundaries of hypertext sources, like those found on the World Wide Web today, are difficult to ascertain because no single party or institution controls changes in the nodes and links that make hypertext objects live and highly responsive information resources. A high degree of volatility accompanies 70-290 these objects because the contents of nodes change, the sites where information resources are stored change, and the links between nodes change, move, and vanish. Some recent tools, such as the MOMspider (Multi- Owner Maintenance Spider) and Web:Lookout are capable of traversing a portion of the Web and noting maintenance problems such as broken links, moved documents, modified documents, and objects that have exceeded their expiration 70-291 dates (Ackerman and Fielding). While tools such as these are useful for current maintenance, they do not address long-term preservation concerns. If further developed to address preservation problems, tools such as these have the potential to serve as filters, identify similar or identical objects, and monitor for maintenance problems.