This paper presents an approach to extract data records from websites, particularly ones with event calendars. We therefore use languagespecific key expressions and HTML patterns to recognize every single event given on the investigated web page. One of the most remarkable advantages of our method is that it does not require any additional classification steps based on machine learning algorith...

Internet has become most popular place for accessing World Wide Web (WWW). With the enormous growing amount of information over Internet, accurate and efficient web data extraction has become necessary. Nevertheless, there are various kind of web pages which are having structured, semi-structured and unstructured data. A web page is a formation of many information blocks. Besides an informative...

The world wide web contains vast amounts of data, but only a small portion of it is accessible in an operational form by machines. The rest of this vast collection is behind a presentation layer that renders web pages in a humanfriendly form but also hampers machine-processing of data. The task of converting web data into operational form is the task of data extraction. Current approaches to da...

The longstanding problem of automatic table interpretation still illudes us. Its solution would not only be an aid to table processing applications such as large volume table conversion, but would also be an aid in solving related problems such as information extraction and semi-structured data management. In this paper, we offer a conceptual modeling solution for the common special case in whi...

A few neuroinformatics databases now exist that record results from neuroimaging studies in the form of brain coordinates in stereotaxic space. The Brede Toolbox was originally developed to extract, analyze and visualize data from one of them - the BrainMap database. Since then the Brede Toolbox has expanded and now includes its own database with coordinates along with ontologies for brain regi...

Web data analysis applications such as extracting mutual funds information from a website, daily extracting opening and closing price of stock from a web page involves web data extraction. Every time you need analyze data, you need to visit number of web sites. It is very time consuming process to construct wrapper to visit those sites and collect data. In this paper, we propose technique calle...

Web Data Extraction is a critical task by applying various scientific tools and in a broad range of application domains. To extract data from multiple web sites are becoming more obscure, as well to design of web information extraction systems becomes more complex and time-consuming. We also present in this paper so far various risks in web data extraction. Identifying data region from web is a...