共查询到20条相似文献，搜索用时 751 毫秒
1.
数字图书馆在WWW上进行相应的信息展示与提供，基于HTML的文档标记使信息查寻遇到了很大的挑战。本文提出了基于XML的搜索引擎逻辑结构，并对其中的关键技术进行了研究，提出了对XML半结构化文档建立索引和查寻时采用的数据结构和算法，使得数字图书馆在WWW上开展深层次信息提供成为可能，并且也使图书馆原有的MARC信息资源能得到充分利用。 相似文献
2.
XML是一种很有发展潜力的技术，而XML转换则是充分发挥XML无限扩展性的一个关键技术。本文简单介绍了电子商务领域XML的使用情况；其次，以Oracle在电子商务中的应用，深入分析了使用XML进行数据交换的枝术及过程；接着，演示了使用存储在数据库表中的信息生成XML文档，以及把XML文档内容保存到数据库表中的实际操作；最后，深层次思考了XML面临的问题。 相似文献
3.
为了实现对多XML文档管理与操作,本文首先研究多XML文档建立方式和特点,并运用高效便捷的LINQ语言中联合查询语法实现同时对多个XML文档联合操作。该方法能够保证多个XML文档数据的一致性和完整性,便于多个XML文档数据的维护与管理。 相似文献
4.
该文着重研究了XML的索引结构，并对XML数据库的存取提出了自己的观点。构造了对XML这种半结构化文档建立索引和查询时采用的数据结构和算法。 相似文献
5.
XML与关系数据库数据的转换的研究 总被引：1，自引：0，他引：1
XML数据库等已经开始迅速发展．但是这些新挂术在现阶段仍然不很成熟，目前对XML数据的普遍处理方法是将其转换成关系格式，以便利用目前成熟的关系数据库枝术进行存储和查询。文章讨论了XML文档与关系型数据库之间的关系，并介绍了如何将XML文件数据与关系数据库数据转换的具体实现。 相似文献
6.
针对文档管理所面临的难题,提出了基于XML的文档管理的思路,详细阐述了基于XML的文档管理实现过程中的几个核心问题。 相似文献
7.
XML为网上教育资源规范化和标准化提供了有效的解决方法。在研究现有的XML文档与教育资源进行数据转换的方法的基础上，提出了一种基于元素树的新的数据转换方法。 相似文献
8.
企业原有的独立的系统软件和操作方式,在局部系统与中心系统之间形成了数据的异构性,数据映射技术能够很好的解决异构数据之间的转换,利用中间产生的XML文档作为交换标准,使用XML标记语言对不同的异构数据进行了统一的定制和描述,形成统一的XML映射文档,对已定制XML文档的提取,不同结构的数据描述成统一格式,最终达到从源数据库向目标数据库迁移的目的。 相似文献
9.
XML及其相关技术日益渗透至计算机科学的各个层面。分析了XML技术在文档内容管理领域的优势和应用,并重点对基于XML的文档内容管理系统的设计和具体实现进行了讨论。 相似文献
10.
11.
Extensible Markup Language (XML) documents are associated with time in two ways: (1) XML documents evolve over time and (2) XML documents contain temporal information. The efficient management of the temporal and multi-versioned XML documents requires optimized use of storage and efficient processing of complex historical queries. This paper provides a comparative analysis of the various schemes available to efficiently store and query the temporal and multi-versioned XML documents based on temporal, change management, versioning, and querying support. Firstly, the paper studies the multi-versioning control schemes to detect, manage, and query change in dynamic XML documents. Secondly, it describes the storage structures used to efficiently store and retrieve XML documents. Thirdly, it provides a comparative analysis of the various commercial tools based on change management, versioning, collaborative editing, and validation support. Finally, the paper presents some future research and development directions for the multi-versioned XML documents. 相似文献
12.
《Information processing & management》2019,56(5):1753-1770
XML has become a universal standard for information exchange over the Web due to features such as simple syntax and extensibility. Processing queries over these documents has been the focus of several research groups. In fact, there is broad literature in efficient XML query processing which explore indexes, fragmentation techniques, etc. However, for answering complex queries, existing approaches mainly analyze information that is explicitly defined in the XML document. A few work investigate the use of Prolog to increase the query possibilities, allowing inference over the data content. This can cause a significant increase in the query possibilities and expressive power, allowing access to non-obvious information. However, this requires translating the XML documents into Prolog facts. But for regular queries (which do not require inference), is this a good alternative? What kind of queries could benefit from the Prolog translation? Can we always use Prolog engines to execute XML queries in an efficient way? There are many questions involved in adopting an alternative approach to run XML queries. In this work, we investigate this matter by translating XML queries into Prolog queries and comparing the query processing times using Prolog and native XML engines. Our work contributes by providing a set of heuristics that helps users to decide when to use Prolog engines to process a given XML query. In summary, our results show that queries that search elements by a key value or by its position (simple search) are more efficient when run in Prolog than in native XML engines. Also, queries over large datasets, or that searches for substrings perform better when run by native XML engines. 相似文献
13.
M. Mercedes Martínez-Gonzlez Pablo de la Fuente 《Information processing & management》2007,43(6):1808
References to parts of structured documents use their structure to locate the piece of document which is the reference target. On the other hand, XML has become an increasingly important language for structured documents. One of its most important related languages is XPath, the language that permits fragments of XML documents to be selected. In this article we present a methodology, and an application case, to automatically extract and solve references to fragments of structured documents. This approach combines structure manipulation and information extraction, to enhance reference extraction tools by improving the precision of the references extracted. We take advantage of XML markup to locate the position within the structure in which the references are found. The use of XPath, one of the most important XML related languages, for reference resolution is original: the resolution tool automatically builds XPath expressions. This proposal is inspired (and implemented) from our work with legislative documents. 相似文献
14.
Mouna Torjmen-Khemakhem Karen Pinel-Sauvagnat Mohand Boughanem 《Information processing & management》2013
Multimedia objects can be retrieved using their context that can be for instance the text surrounding them in documents. This text may be either near or far from the searched objects. Our goal in this paper is to study the impact, in term of effectiveness, of text position relatively to searched objects. The multimedia objects we consider are described in structured documents such as XML ones. The document structure is therefore exploited to provide this text position in documents. Although structural information has been shown to be an effective source of evidence in textual information retrieval, only a few works investigated its interest in multimedia retrieval. More precisely, the task we are interested in this paper is to retrieve multimedia fragments (i.e. XML elements having at least one multimedia object). Our general approach is built on two steps: we first retrieve XML elements containing multimedia objects, and we then explore the surrounding information to retrieve relevant multimedia fragments. In both cases, we study the impact of the surrounding information using the documents structure. 相似文献
15.
16.
近年来,XML已成为信息表示、交换和发布的标准,因此,XML数据查询已成数据库(DB)和信息检索(IR)领域广发研究的问题。XML通常被视为一个标签树,常用的方法是近似查询。由于在用户查询通常有一定的关系约束出现,在分析了用户查询对XML元素和值关系约束之后,本文提出了使用关系约束近似提取XML元素的方法 相似文献
17.
基于XML的数字图书馆检索技术研究 总被引：1，自引：0，他引：1
随着XML数字图书馆的迅速发展,怎样快速有效地对XML文档进行查询和处理,正受到越来越多的重视,本文对XML数字图书馆检索系统进行了分类比较。并从检索模型、文档聚类、索引技术3个方面对XML数字图书馆检索研究方向进行了阐述。 相似文献
18.
Octavio Santana Suárez Francisco J. Carreras Riudavets Zenón Hernández Figueroa Antonio C. González Cabrera 《Information processing & management》2007
This study proposes the codification of lexical information in electronic dictionaries, in accordance with a generic and extendable XML scheme model, and its conjunction with linguistic tools for the processing of natural language. Our approach is different from other similar studies in that we propose XML coding of those items from a dictionary of meanings that are less related to the lexical units. Linguistic information, such as morphology, syllables, phonology, etc., will be included by means of specific linguistic tools. The use of XML as a container for the information allows the use of other XML tools for carrying out searches or for enabling presentation of the information in different resources. This model is particularly important as it combines two parallel paradigms—extendable labelling of documents and computational linguistics—and it is also applicable to other languages. We have included a comparison with the labelling proposal of printed dictionaries carried out by the Text Encoding Initiative (TEI). The proposed design has been validated with a dictionary of more than 145 000 accepted meanings. 相似文献
19.
介绍了XML的概念和一些特点，分析了XML和SQL Server2000数据交换的几种方式，以及在SQL Server2000中，使用SELECT语句可以把查询结果存储为XML文档，使用OPENXML语句提供了在关系数据库表中存储XML文档的功能，并实际实现了SQL Server2000和XML之间的数据交换。 相似文献
20.
基于XML的高校教学信息管理系统,主要由素材类教学资源、网络课程库、教学资源管理系统、远程教学系统支持平台组成。把XML标记语言用于教学资源的发布和管理,实现教育资源的标准化,进而开发了一个高性能的高校教学信息管理系统。 相似文献