Showing papers on "Data publishing published in 2004"

Selective and authentic third-party distribution of XML documents

Abstract: Third-party architectures for data publishing over the Internet today are receiving growing attention, due to their scalability properties and to the ability of efficiently managing large number of subjects and great amount of data. In a third-party architecture, there is a distinction between the Owner and the Publisher of information. The Owner is the producer of information, whereas Publishers are responsible for managing (a portion of) the Owner information and for answering subject queries. A relevant issue in this architecture is how the Owner can ensure a secure and selective publishing of its data, even if the data are managed by a third-party, which can prune some of the nodes of the original document on the basis of subject queries and access control policies. An approach can be that of requiring the Publisher to be trusted with regard to the considered security properties. However, the serious drawback of this solution is that large Web-based systems cannot be easily verified to be secure and can be easily penetrated. For these reasons, we propose an alternative approach, based on the use of digital signature techniques, which does not require the Publisher to be trusted. The security properties we consider are authenticity and completeness of a query response, where completeness is intended with regard to the access control policies stated by the information Owner. In particular, we show that, by embedding in the query response one digital signature generated by the Owner and some hash values, a subject is able to locally verify the authenticity of a query response. Moreover, we present an approach that, for a wide range of queries, allows a subject to verify the completeness of query results.

A uniform system for publishing and maintaining XML data

Abstract: XML has become the prime standard for data exchange on the Web. To exchange data residing in Databases, one needs to publish it in XML. Data publishing is often done with a predefined “schema.” The chapter proposes a new approach for schema-directed publishing of relational data in XML, based on the novel notion of attribute transformation grammars (ATGs). ATGs provide guidance on how to define views conforming to target schemas (DTDs), and automatically ensure schema conformance. The chapter also develops an incremental algorithm for maintaining XML views produced by ATGs, based on new incremental computation techniques that capitalize on the hierarchical structure of XML data and unique features of the ATGs. Taking real-life data from Gene Ontology (GO), this chapter also demonstrates how this system can efficiently publish the GO data in XML with respect to a predefined recursive DTD, and how it incrementally updates the target XML data in response to changes to the underlying GO database.

Web-Based Image Data Publishing

Abstract: In this paper, the characteristics of remote sensing image data are represented, the key technologies of publishing images on the Web are analyzed, and the data organization and storage of single image files, successive image files in the same projection belt, and successive image files across several projection belts are discussed, respectively. At last, the implementation of publishing image data on the Web are represented.

XML-based complex lab data representing, storing and publishing

Abstract: The problem of heterogeneous data integration in industrial supervisory control is presented and analyzed The demand and difficulties of complex lab data representing, storing and publishing are outlined and analyzed in this paper It is pointed out that a self-descriptive data structure with clear organization of contents and easy connection to human-machine interface is needed A solution based on XML (eXtended Mark-up Language) is proposed with combination of different layers of data storage, data logic and presentation, human-machine interface An XML-based system is developed to meet the demands of laboratory data publishing with complex structure Construction of user interface from XML schema, conversion of lab data into XML, algorithm of storing XML into RDBMS (relation database manager system), query and reconstruction of XML documents from the RDBMS are touched upon The data structure is described in details and its unique advantage is presented

Research on Data Format Transformation Software in Map Publishing

Abstract: In this paper, the current status and problems about map publishing are analyzed, and the idea to develop the data format transformation software based on MapGIS is put forward . The format is used to transform the multi-source data to MapGIS and publish map by MapGIS .Thus, the problems about integration between map cartography and publishing and multi-source data publishing are solved.