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In this paper, we propose an approach to retrieval XML data with structural context relaxation. We process user query and XML documents as structural term set. Context resemblance is computed based on level weight of element in context, level similarity between elements in longest matched subsequence and other factors. We extend Vector Space Model to answer XML content and structure search. Experiments...
XML is today the most used data interchange format for business-to-business applications. Indeed, an increasing amount of data is created and published over the Internet every day in XML format. Moreover, organizations need more and more to share sets of XML documents usually managed via a common XML repository. XML copyright protection and source tracking have become strong requirements for collaborative...
This paper presents a system for automatic annotation of handwritten historical documents based on Markov models. The proposed system first extracts XML schema which describes a specific domain and than a Mapping algorithm is used for the generation of the new XML schemes. Mapping algorithm has as inputs two schemes reference schema and a specific schema. XML schemes are generated using Markov models,...
The need for interoperation and data exchange through the Internet has made Extensible Markup Language (XML) a dominant standard for data representation, while relational databases are widely used in enterprises to support critical business operations. XML querying language (XUpdate) is used to modify XML documents where as structured query language (SQL) for retrieving and manipulating data in relational...
The purpose for integration system is to provide a unified, global view to the user over various heterogeneous sources. To answer user queries, a data integration system employs a set of semantic mapping between and mediated schema(global schema) and schemas of data sources (local schema). Such data integration raises main challenging issue: (1) Scheme creations and (2) Schema mappings. In order to...
Knowledge processing of instructional intelligent expert system is discussed in this paper. The study is based on the theories of Knowledge Engineering. The design method and model is also presented, which is based on the frame, production rule and XML.
This paper presents a graphical approach to model XML documents based on a Data Type Documentation called Graphical Notations-Data Type Documentation (GN-DTD). GN-DTD allows us to capture syntax and semantic of XML documents in a simple way but precise. Using various notations, the important features of XML documents such as elements, attributes, relationship, hierarchical structure, cardinality,...
Providing efficient query to XML documents is crucial, as XML has become the most important technique to exchange data in WWW. Due to its tree-structure paradigm, XML is superior for its capability of storing and querying complex data. Therefore, discovering frequent XML query patterns over user queries has become an interesting topic for XML data management. In this paper, we present an efficient...
Next generation of knowledge management systems will utilize different methods and techniques from the following communities to achieve the vision of ubiquitous knowledge: Semantic Web and Web Services, Agent Technologies, Mobility. A knowledge asset (Web resource or service) to become an intellectual capital must be shared; it increases in value while being used. XML is the ideal format for the exchange...
We introduce an XML search engine called XRQ. The search engine employs recursive querying techniques for answering XML loosely structured queries. Recursive querying allows a query to query the results of a previous application of itself or of another query. We experimentally evaluated the search quality and efficiency of XRQ and compared it with two search engines, XSeek and XKSearch.
Aimed at the limitations in previous research about integrating systems depending on a special field over last ten years, the paper proposes a general integrating platform which can be used in a variety of applications. In general, integrating systems suffer from performance bottlenecks due to network overhead. In order to address this problem, we introduce semantic caching mechanisms to reduce the...
Language integrated query (LINQ) provides a uniform, object-oriented way to access data from heterogeneous sources, and thus simplifies the interaction between object-oriented programming and relational data. We design a mini-course of LINQ programming that aims at bridging the gap between the traditional object-oriented programming course and database programming course. Starting with the prerequisite...
Due to the complexity of XML query languages, the need for visual query interfaces that can reduce the burden of query formulation is fundamental to the spreading of XML to wider community. We present a RDBMS-based XML query evaluation system, called XBLEND, that takes a novel and non-traditional approach to improving query performance by blending visual query formulation and query processing. It...
Inspired by the great success of information retrieval (IR) style keyword search on the Web, keyword search on XML has emerged recently. The difference between text database and XML database results in three new challenges: (1) Identify the user search intention, i.e. identify the XML node types that user wants to search for and search via. (2) Resolve keyword ambiguity problems: a keyword can appear...
With the development of the technique of XML, how to make use of database to store and query XML documents has become a hot topic. In this paper, a labeling scheme and a storage method of XML documents based-on this labeling scheme are proposed. According to the node types, this method decomposes the document tree structure into nodes and stores them into the relational table; it enables us to store...
This paper presents a novel schema mediation approach, called XMiner, for mining mediated schemas from a set of XML schemas. XMiner addresses three main problems resulting from the heterogeneous source schemas: nesting discrepancy, backward paths and schema discrepancy. XMiner discovers frequent substructures using frequent subtree mining algorithms, and then constructs a mediated schemas. XMiner...
XML has gained wide popularity for specifying and exchanging data on the WWW. XML is also used to store large amounts of bibliographic and scientific data. However, XML is by nature verbose and this contributes to the fact that XML databases are much large in size, thus increasing the cost for storing and retrieving data in smaller handheld devices which do not have large memory capacity. In order...
The past few years have seen a dramatic increase in the popularity and adoption of XML in Internet technology. With this revolution, an effective way for storing and querying XML documents is crucial. In this paper, we propose the INLAB2 architecture for fast native XML storage and accurate query retrieval. INLAB2 comprises of five main components, namely XML Parser, XML Encoder, XML Indexer, Data...
Hierarchies are common in computer systems, from the XML data model in database management systems to file directories in operating systems. When a single hierarchy is imposed on data, a query becomes ldquobrittlerdquo in the sense that it might fail to produce the desired result when executed on the same data organized in a different hierarchy, when the hierarchy evolves to a slightly different hierarchy,...
With the rapidly increasing popularity of XML as a data format, there is a large demand for efficient techniques in storing and querying XML documents. However XML is by nature verbose, due to repeatedly used tags that describe data. For this reason the storage requirements of XML can be excessive and lead to increased costs for data manipulation. Therefore, it seems natural to use compression techniques...
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