When information professionals justify the cost of premium content databases and combat the notion that everything is available at no charge on the Internet, they frequently point to the value add of indexing. However, the com-panies that create our value-added indexing are moving away from human indexing and toward automated indexing. Web 2.0 applications are encouraging user-generated tagging, which is an uncontrolled type of indexing. Some premium content sources, such as Engineering Village, are incorporating customer-generated tags into their fee-based products. How do these trends affect the validity of our justifications for premium content? How can information professionals today truly guarantee that they've found the best, most relevant, and most reliable information when dealing with value-added indexing?
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机译：当信息专业人士证明高级内容数据库的成本是合理的，并且反对互联网上所有内容都免费提供的观念时，他们经常会指出索引的附加值。但是，创建我们的增值索引的公司正在从人工索引转移到自动索引。 Web 2.0应用程序鼓励用户生成标记，这是不受控制的索引类型。一些高级内容来源，例如Engineering Village，正在将客户生成的标签合并到其收费产品中。这些趋势如何影响我们对优质内容辩护的有效性？今天的信息专业人员如何才能真正保证在处理增值索引时能找到最佳，最相关和最可靠的信息？
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