Robustness of External Annotation for Web-Page Clipping: Empirical Evaluation with Evolving Real-Life Web Documents

摘要: Web metadata is crucial for providing machine-understandable descriptions of resources, and has a number applications such as discovery, qualification, adaptation documents. While annotations are often embedded into document, can also be associated externally by means addressing expressions represented with the XPath language. However, there been little empirical study robust pointing using expressions, in spite increasing prevalence language not only use XSLT, but emerging content systems. The objective this to evaluate robustness especially ones that used generation external annotations, draw practical implications reliable annotation.