Extracting data from web pages using wrappers is a fundamental problem arising in a large variety of applications of vast practical interests. In this paper, we propose a novel technique to the problem of differentiating roles of data items from Web pages, which is one of the key problems in our automatic extraction approach. The problem is resolved at various levels: semantic blocks, sections ...

The World Wide Web is enriched with a large collection of data, scattered in deep web databases and web pages in unstructured or semi structured formats. Recently evolving customer friendly web applications need special data extraction mechanisms to draw out the required data from these deep web, according to the end user query and populate to the output page dynamically at the fastest rate. In...

This paper presents exact joint confidence regions for the parameters of the Rayleigh distribution based on record data. By providing some appropriate pivotal quantities, we construct several joint confidence regions for the Rayleigh parameters. These joint confidence regions are useful for constructing confidence regions for functions of the unknown parameters. Applications of the joint confid...

The Lixto project is an ongoing research effort in the area of Web data extraction. Whereas the project originally started out with the idea to develop a logic-based extraction language and a tool to visually define extraction programs from sample Web pages, the scope of the project has been extended over time. Today, new issues such as employing learning algorithms for the definition of extrac...

The problem of extracting data records on the response pages returned from web databases or search engines. World Wide Web has posed a challenging problem in extracting relevant data. Traditional web crawlers focus only on the surface web while the deep web keeps expanding behind the scene. Deep web pages are created dynamically as a result of queries posed to specific web databases. Extracting...

This paper presents DeepEC (Deep Web Extraction and Cataloguing Process), a new method for content extraction of Deep Web databases and its subsequent cataloguing. Our focus is on the extraction of hidden Web content presented in HTML pages generated from Web forms query submissions. While state-of-the-art information extraction and cataloguing methods address this issue separately, DeepEC is a...

Web information extraction is the key part of web data integration. With the need of e-commerce website and the development of web design, web pages with multiple presentation templates arise. The current web information extraction systems are usually based on single presentation template, so web pages with multiple presentation templates can’t be extracted efficiently. This paper focuses on th...

the internet is already the primary source of tourist destination information for travelers. according to world tourism organization, about 95% of web users use the internet to gather travel related information and about 93% indicate that they visited tourism web sites when planning for vacations. the number of people turning to the internet for vacation and travel planning has increased more t...

There are various kinds of objects embedded in static Web pages and online Web databases. Extracting and integrating these objects from the Web is of great significance for Web data management. The existing Web information extraction (IE) techniques cannot provide satisfactory solution to the Web object extraction task since objects of the same type are distributed in diverse Web sources, whose...