scholarly journals Index Structures for XML Databases

Author(s):  
Samir Mohammad ◽  
Patrick Martin

Extensible Markup Language (XML), which provides a flexible way to define semistructured data, is a de facto standard for information exchange in the World Wide Web. The trend towards storing data in its XML format has meant a rapid growth in XML databases and the need to query them. Indexing plays a key role in improving the execution of a query. In this chapter the authors give a brief history of the creation and the development of the XML data model. They discuss the three main categories of indexes proposed in the literature to handle the XML semistructured data model and provide an evaluation of indexing schemes within these categories. Finally, they discuss limitations and open problems related to the major existing indexing schemes.

Author(s):  
Sergio Flesca ◽  
Fillippo Furfaro ◽  
Sergio Greco ◽  
Ester Zumpano

The World Wide Web is of strategic importance as a global repository for information and a means of communicating and sharing knowledge. Its explosive growth has caused deep changes in all the aspects of human life, has been a driving force for the development of modern applications (e.g., Web portals, digital libraries, wrapper generators, etc.), and has greatly simplified the access to existing sources of information, ranging from traditional DBMS to semi-structured Web repositories. The adoption by the WWW consortium (W3C) of XML (eXtensible Markup Language) as the new standard for information exchange among Web applications has led researchers to investigate classical problems in the new environment of repositories containing large amounts of data in XML format.


10.28945/2854 ◽  
2005 ◽  
Author(s):  
Shirlee-ann Knight ◽  
Janice Burn

The rapid growth of the Internet as an environment for information exchange and the lack of enforceable standards regarding the information it contains has lead to numerous information qual ity problems. A major issue is the inability of Search Engine technology to wade through the vast expanse of questionable content and return "quality" results to a user's query. This paper attempts to address some of the issues involved in determining what quality is, as it pertains to information retrieval on the Internet. The IQIP model is presented as an approach to managing the choice and implementation of quality related algorithms of an Internet crawling Search Engine.


Author(s):  
Mengchi Liu ◽  
Tok Wang Ling

With the recent popularity of the World Wide Web, an enormous amount of heterogeneous information is now available online. As a result, information about the same real-world object often spreads over different data sources, and may be partial and inconsistent. How to obtain information as complete as possible and detect inconsistency from these sources is thus a challenge. Previous work using a simple graph-based or tree-based data model to represent heterogeneous data coming from various sites fail to provide a proper foundation for the integration of data with partial and inconsistent information. In order to integrate such data, we need a powerful data model that is more expressive than the existing graph-based and tree-based ones to account for the existence of partial and inconsistent information from different data sources. In this chapter, we propose a novel data model for such data and study how to integrate such data spread in various sources and check consistency in the meantime. We propose a new operator called integration for this purpose and discuss its semantic properties.


2012 ◽  
Vol 36 (3) ◽  
pp. 273-293
Author(s):  
Johannes Klare

André Martinet holds an important position in the history of linguistics in the twentieth century. For more than six decades he decisively influenced the development of linguistics in France and in the world. He is one of the spokespersons for French linguistic structuralism, the structuralisme fonctionnel. The article focuses on a description and critical appreciation of the interlinguistic part of Martinet’s work. The issue of auxiliary languages and hence interlinguistics had interested Martinet greatly from his youth and provoked him to examine the matter actively. From 1946 onwards he worked in New York as a professor at Columbia University and a research director of the International Auxiliary Language Association (IALA). From 1934 he was in contact with the Danish linguist and interlinguist Otto Jespersen (1860–1943). Martinet, who went back to Paris in 1955 to work as a professor at the École Pratique des Hautes Études (Sorbonne), increasingly developed into an expert in planned languages; for his whole life, he was committed to the world-wide use of a foreign language that can be learned equally easily by members of all ethnic groups; Esperanto, functioning since 1887, seemed a good option to him.


Philosophy ◽  
1944 ◽  
Vol 19 (74) ◽  
pp. 195-215
Author(s):  
J. W. Harvey

Contemplating the catastrophic course of the Nazi Revolution we may well find it all too easy to see nothing in the spectacle but the nether darkness made visible; and if we are advised that it is not merely permissible but highly advisable to learn from the enemy, we may be tempted to think that whatever the Nazi war-machine has to teach the strategist and the technician, the political history of Germany in the last decade, and in particular the political ideology that has imposed itself upon the German mind with such apparent thoroughness, can yield only the negative lesson of a warning, by displaying upon the world-wide stage the doomful consequences of wrong principles ruthlessly pushed to their extreme. But it is certainly an error to deny that nothing of more positive value has emerged out of the revolutionary cauldron: and indeed it would be more than strange, where such whole-hearted energies of mind are being enlisted in the evil cause of Nazism, if none of its votaries had ever stumbled for a time into wisdom.


Author(s):  
Giorgos Laskaridis ◽  
Konstantinos Markellos ◽  
Penelope Markellou ◽  
Angeliki Panayiotaki ◽  
Athanasios Tsakalidis

The emergence of semantic Web opens up boundless new opportunities for e-business. According to Tim Berners-Lee, Hendler, and Lassila (2001), “the semantic Web is an extension of the current Web in which information is given well-defined meaning, better enabling computers and people to work in cooperation”. A more formal definition by W3C (2001) refers that, “the semantic Web is the representation of data on the World Wide Web. It is a collaborative effort led by W3C with participation from a large number of researchers and industrial partners. It is based on the resource description framework (RDF), which integrates a variety of applications using eXtensible Markup Language (XML) for syntax and uniform resource identifiers (URIs) for naming”. The capability of the semantic Web to add meaning to information, stored in such way that it can be searched and processed as well as recent advances in semantic Web-based technologies provide the mechanisms for semantic knowledge representation, exchange and collaboration of e-business processes and applications.


Author(s):  
Esharenana E. Adomi

The World Wide Web (WWW) has led to the advent of the information age. With increased demand for information from various quarters, the Web has turned out to be a veritable resource. Web surfers in the early days were frustrated by the delay in finding the information they needed. The first major leap for information retrieval came from the deployment of Web search engines such as Lycos, Excite, AltaVista, etc. The rapid growth in the popularity of the Web during the past few years has led to a precipitous pronouncement of death for the online services that preceded the Web in the wired world.


1996 ◽  
Vol 110 (1) ◽  
pp. 52-56 ◽  
Author(s):  
Hidetoshi Haraguchi ◽  
Hitoshi Hentona ◽  
Hidekazu Tanaka ◽  
Atsushi Komatuzaki

AbstractPleomorphic adenoma arising in the external auditory canal is rare. We report the case of a 38-year-old man. To better grasp the clinical features and natural history of this uncommon tumour, we also reviewed the world wide literature and found 24 similar cases, which we analysed together with our own.


1998 ◽  
Vol 54 (6) ◽  
pp. 1065-1070 ◽  
Author(s):  
Peter Murray-Rust

The rapid growth of the World Wide Web provides major new opportunities for distributed databases, especially in macromolecular science. A new generation of technology, based on structured documents (SD), is being developed which will integrate documents and data in a seamless manner. This offers experimentalists the chance to publish and archive high-quality data from any discipline. Data and documents from different disciplines can be combined and searched using technology such as eXtensible Markup Language (XML) and its associated support for hypermedia (XLL), metadata (RDF) and stylesheets (XSL). Opportunities in crystallography and related disciplines are described.


First Monday ◽  
2015 ◽  
Author(s):  
Gerard Goggin

As the World Wide Web turns 25, it is an appropriate time to ask: where are we are now with disability and the Internet? A good place to look is in the burgeoning area of Internet and mobile technology. Accordingly, this paper explores the issues and prospect for disability and mobile Internet. It provides a brief history of the entwined nature of the rise of disability and the Internet, discusses the emergence of mobile Internets, and then turns to a discussion of mobile Web accessibility. It concludes by noting the limits of mobile Web accessibility, for its struggle to adopt an expanded concept of disability — but also because of growing complexity of mobile Internets.


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