In this paper, we propose a new content consistency model for pervasive Internet access. We argue that content retrieved over the Internet consists of not only the data object but also its attributes needed to perform appropriate network or presentation related functions such as caching, content reuse, and content adaptation. With this model, four types of content consistency are defined. To get a deeper insight on the current situation of content consistency over Internet, real content on replica / CDN (Content Delivery Network) was monitored and analyzed. Surprisingly, we found that there are lots of discrepancies in data object and attributes found by comparing the original copy and the retrieved copy of the content. This result is important because they have direct implications to the trustworthiness of information over the Internet.
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