A Deep Web wrapper is a program that extracts contents from search results. We propose a new automatic wrapper generation algorithm which discovers a repetitive pattern from search results. The repetitive pattern is expressed by token sequences which consist of HTML tags, plain texts and wild-cards. The algorithm applies a string matching with mismatches to unify the variation from the template...

ManyWindows-based legacy applications can be programmatically accessed using COM interfaces. However, calling COM components from Java is not straightforward. This report compares four open source Java-COM integration packages. A technique for typesafe Java-COM integration is presented. The technique is based on typesafe COM interface wrappers using jcom, java2com and JACOB libraries. Examples ...

The Web is undoubtedly the largest and most diverse repository of data, but it was not designed to offer the capabilities of traditional data base management systems – which is unfortunate. In a true data federation, all types of data sources, such as relational databases and semi-structured Web sites, could be used together. IBM WebSphere uses the “request-reply-compensate” protocol to communi...

Disjunctive logic programs are a powerful tool in knowledge representation and commonsense reasoning. The recent development of an efficient disjunctive logic programming engine, named DLV, allows to exploit disjunctive logic programs for solving complex problems. However, disjunctive logic programming systems are currently missing any interface supporting the integration between commonly used ...

INTRODUCTION It is well known that the performance of most data mining algorithms can be deteriorated by features that do not add any value to learning tasks. Feature selection can be used to limit the effects of such features by seeking only the relevant subset from the original features (de Souza et al., 2006). This subset of the relevant features is discovered by removing those that are cons...

There is an increase in the number of data sources that can be queried across the WWW. Such sources typically support HTML forms-based interfaces and search engines query collections of suitably indexed data. The data is displayed via a browser. One drawback to these sources is that there is no standard programming interface suitable for applications to submit queries. Second, the output (answe...

The deep Web presents a pressing need for integrating large numbers of dynamically evolving data sources. To be more automatic yet accurate in building an integration system, we observe two problems: First, across sequential tasks in integration, how can a wrapper (as an extraction task) consider the peer sources to facilitate the subsequent matching task? Second, across parallel sources, how c...