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| Category | Value | ||
| Available via | http://dbpubs.stanford.edu/pub/2001-19 | ||
| Previous version | 2000-36 | ||
| Submitted on | 18th of May 2001 | ||
| Author | Raghavan, Sriram; Garcia-Molina, Hector | ||
| Title | Crawling the Hidden Web | ||
| Date of publication | 2001 | ||
| Published in | To appear in VLDB 2001 | ||
| Citation | Raghavan, Sriram; Garcia-Molina, Hector. Crawling the Hidden Web, To appear in VLDB 2001 | ||
| Number of pages | 12 | ||
| Language | English | ||
| Project | Digital Libraries | ||
| Type | Conference or Journal Paper | ||
| Subject group | Databases and the Web | ||
| Abstract | Current-day crawlers retrieve content only from the publicly indexable Web, i.e., the set of Web pages reachable purely by following hypertext links, ignoring search forms and pages that require authorization or prior registration. In particular, they ignore the tremendous amount of high quality content ``hidden'' behind search forms, in large searchable electronic databases. In this paper, we address the problem of designing a crawler capable of extracting content from this hidden Web. We introduce a generic operational model of a hidden Web crawler and describe how this model is realized in HiWE (Hidden Web Exposer), a prototype crawler built at Stanford. We introduce a new Layout-based Information Extraction Technique (LITE) and demonstrate its use in automatically extracting semantic information from search forms and response pages. We alsopresent results from experiments conducted to test and validate our techniques. | ||
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| Management of the document by | pubs@db.stanford.edu
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