NET – A System for Extracting Web Data from Flat and Nested Data Records [chapter]

Bing Liu, Yanhong Zhai
2005 Lecture Notes in Computer Science  
This paper studies automatic extraction of structured data from Web pages. Each of such pages may contain several groups of structured data records. Existing automatic methods still have several limitations. In this paper, we propose a more effective method for the task. Given a page, our method first builds a tag tree based on visual information. It then performs a post-order traversal of the tree and matches subtrees in the process using a tree edit distance method and visual cues. After the
more » ... rocess ends, data records are found and data items in them are aligned and extracted. The method can extract data from both flat and nested data records. Experimental evaluation shows that the method performs the extraction task accurately.
doi:10.1007/11581062_39 fatcat:n7cv3a5aqfhlrgb3hgz2eit5nu