Sub-document Timestamping: A Study on the Content Creation Dynamics of Web Documents

摘要

The creation time of documents is an important kind of information in temporal information retrieval, especially for document clustering, timeline construction and search engine improvements. Considering the manner in which content on the Web is created, updated & deleted, the common assumption that each document has only one creation time is not suitable for Web documents. In this paper, we investigate to what extent this assumption is wrong. We introduce two methods to timestamp individual parts (sub-documents) of Web documents and analyze in detail the creation & update dynamics of three classes of Web documents.