نتایج جستجو برای: web wrapper generation

تعداد نتایج: 567401  

2002
Timour Katchaounov Tore Risch Simon Zürcher

A system is described where multiple Internet search engines (ISEs), e.g. Alta Vista or Google, are accessed from an Object-Relational mediator database system. The system makes it possible to express object-oriented (OO) queries to different ISEs in terms of a high level OO schema, the ISE schema. The OO ISE schema combined with the mediator database system provides a natural and extensible me...

Journal: :J. Comput. Syst. Sci. 1999
Giansalvatore Mecca Paolo Atzeni

The paper develops Editor, a language for manipulating semi-structured documents, such as the ones typically available on the Web. Editor programs are based on two simple ideas, taken from text editors: \search" instructions are used to select regions of interest in a document, and \cut & paste" to restructure them. We study the expressive power and the complexity of these programs. We show tha...

2003
Maria Teresa Pazienza Armando Stellato Michele Vindigni

E-commerce and the continuous growth of the WWW has seen the rising of a new generation of e-retail sites. A number of commercial agent-based systems has been developed to help Internet shoppers decide what to buy and where to buy it from. In such systems, ontologies play a crucial role in supporting the exchange of business data, as they provide a formal vocabulary for the information and unif...

1995
Jennifer Widom

The topic of data warehousing encompasses architec-tures, algorithms, and tools for bringing together selected data from multiple databases or other information sources into a single repository, called a data warehouse , suitable for direct querying or analysis. In recent years data warehousing has become a prominent buz-zword in the database industry, but attention from the database research c...

1999
Philippe Thiran Jean-Marc Hick Jean-Luc Hainaut

One way to solve the heterogeneity problem of distributed legacy databases consists in wrapping them as objects that can be queried for retrieval and updating. This paper presents the InterDB approach for the generation of conceptual wrappers for legacy databases. The generated wrapper is a software layer that offers a conceptual interface based on the conceptual schema of the wrapped database....

2000
Philip A. Bernstein Laura M. Haas Matthias Jarke Erhard Rahm Gio Wiederhold

The database field has worked on metadata-related problems for 30 years. Examples include data translation and migration, schema evolution, database design, schema / ontology integration, XML wrapper generation, data scrubbing and transformation for data warehouses, message mapping for e-business, and schema-driven web site design. Tools that address these problems are strikingly similar in the...

2002
Wei Zhao

During the software production of any business domain, we will encounter components coming from different component models. Realizing the interoperability among heterogeneous component models at technology domain level is one of the fundamental difficulties of achieving product line constructions at business domain level. Our research of automatic glue and wrapper code generation to compose the...

2009
Martin Labský Vojtech Svátek Marek Nekvasil Dusan Rak

Extraction ontologies represent a novel paradigm in web information extraction (as one of ‘deductive’ species of web mining) allowing to swiftly proceed from initial domain modelling to running a functional prototype, without the necessity of collecting and labelling large amounts of training examples. Bottlenecks in this approach are however the tedium of developing an extraction ontology adeq...

Journal: :Nucleic Acids Research 2006
Hsiang-Yu Yuan Jen-Jie Chiou Wen-Hsien Tseng Chia-Hung Liu Chuan-Kun Liu Yi-Jung Lin Hui-Hung Wang Adam Yao Yuan-Tsong Chen Chun-Nan Hsu

Single nucleotide polymorphism (SNP) prioritization based on the phenotypic risk is essential for association studies. Assessment of the risk requires access to a variety of heterogeneous biological databases and analytical tools. FASTSNP (function analysis and selection tool for single nucleotide polymorphisms) is a web server that allows users to efficiently identify and prioritize high-risk ...

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