• Proceedings of the Korea Information Processing Society Conference
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• 2000.10a
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• pp.101-104
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• 2000

XML이 인터넷을 기반으로 하는 정보교환의 매개체로써 다양한 응용분야로 확산됨에 따라 XML 데이터로부터 구조정보를 추출하고 효율적으로 저장하며 관계형 데이터베이스로부터 추출된 데이터를 XML 문서로 생성하는 시스템이 요구되어진다. 기존의 관계형 데이터베이스 벤더들이 XML을 처리하기 위해 시스템을 확장하기는 하지만 이러한 시스템들은 시스템과 플랫폼에 종속적이라는 단점을 가지고 있다. 이 논문에서는 이러한 문제점을 해결함과 동시에 DTD와 관계형 스키마가 존재하지 않는 환경에서 XML문서를 효율적으로 저장하고 XML_QL을 지원하는 Amoeba 시스템을 소개한다.

• The KIPS Transactions:PartD
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• v.17D no.5
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• pp.353-358
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• 2010

Unlike the traditional databases, queries on XML streams are restricted to a real time processing and memory usage. In this paper, a robust labeling scheme is proposed, which quickly identifies structural relationship between XML fragments. The proposed labeling scheme provides an effective query processing by removing many redundant operations and minimizing the number of fragments being processed. In experimental results, the proposed labeling scheme efficiently processes query processing and optimizes memory usage.

• Proceedings of the Korean Information Science Society Conference
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• 2003.04a
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• pp.587-589
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• 2003

XML의 계층적 구조와 관계 데이터베이스의 평면적 구조가 일치하지 않기 때문에, 관계 데이터베이스에 저장된 XML 데이터에 대한 질의를 처리하여 XML 문서를 생성하기 위해서는 별도의 처리과정이 요구된다. 또한. 기존의 관계 데이터베이스가 XML 질의 언어를 지원하지 못하기 때문에 XML 질의 언어의 SQL로의 변환도 요구된다. 따라서. 몬 논문은 XQuery의 경로 표현식을 패스 테이블을 이용하여 SQL로 변환하여 데이터를 추출하고 뷰를 이용하여 평면적 구조로 저장된 XML 데이터를 계층적 구조인 XML 문서로 효과적으로 변환하여 태깅하는 방법을 제안하고, 이를 이용한 XML 질의 처리 시스템을 설계한다.

• Journal of KIISE:Databases
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• v.29 no.4
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• pp.311-320
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• 2002

The 'wrapper' is a module that extracts and processes information from the specified data source by the pre-composed extraction rule. 'HTML Wrapper for XML' extracts information from the web source as the form of XML document. Since composing the extraction rule is a repetitious and tedious job, it should be done as easy and fast as possible. This paper presents the method to minimize the composing job, which integrates GUI based training and scripting.

• Journal of Korea Multimedia Society
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• v.10 no.12
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• pp.1539-1550
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• 2007

As XML is increasingly used for representing and exchanging data, relational database systems have been trying extend their features to handle XML documents XML documents can be stored in a column with XML data type like primitive types. The shredding method, which is one of the traditional methods for storing and managing XML documents in RDBMS, is still useful and viable although it has some drawbacks due to the structural discrepancy between XML and relational databases. This method may be suitable for data-centric XML documents with simple schema. This paper presents the extended version of the Association inlining method that is based on inlined shredding and compares the performance of querying processing to that of XML type method of conventional relational database systems. The experiments showed that in most cases our method resulted in better performance than the other method based on XML data type. This is due to the fact that our shredding method keeps and uses the order and path information of XML documents. The path table has the information of the corresponding table and column for each distinct path and the structure information of the XML document is extracted and stored in data tables.

• Journal of KIISE:Databases
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• v.31 no.1
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• pp.72-81
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• 2004

Theses days, a number of data over the Internet are represented using XML because of a virtue of XML. In proportion to the increase of XML data, query processing techniques are required that support quickly and efficiently the diverse queries to search the useful information on XML documents. But, up to now, the researches handling queries for XML data are methodologies focusing on how to process regular path expressions. Therefore, we have developed a new genealogy-based indexing technique to solve various queries such as not only regular path expression but also simple path expression, path expression referencing other elements, and so on. Also, we have applied this technique on object-relational model and evaluated the performance for many documents and various query types. The result shows improved performance in comparison with the other storage techniques.

• Journal of KIISE:Databases
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• v.30 no.5
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• pp.532-539
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• 2003

The paper proposes a pre-processing method for efficient processing of XML queries in information retrieval systems with a large amount of XML documents. For the pre-processing, we use a signature-based approach. In the conventional (flat document-based) information retrieval systems, user queries consist of keywords and boolean operators, and thus signatures are structured in a flat manner. However, in XML-based information retrieval systems, the user queries have the form of path query. Therefore, the flat signature cannot be effective for XML documents. In the paper, we propose a structured signature for XML documents. Through experiments, we evaluate the performance of the proposed method.

• Journal of KIISE:Databases
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• v.34 no.3
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• pp.261-269
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• 2007

As a basic research to integrate and to retrieve XML documents efficiently, this paper proposes a clustering method by structures of XML documents. We apply an algorithm processing the many transaction data to the clustering of XML documents, which is a quite different method from the previous algorithms measuring structure similarity. Our method performs the clustering of XML documents not only using the cluster histograms that represent the distribution of items in clusters but also considering the global cluster cohesion. We compare the proposed method with the existing techniques by performing experiments. Experiments show that our method not only creates good quality clusters but also improves the processing time.

• MALSORI
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• no.43
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• pp.113-125
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• 2002

As there are needs to search the Web information via wire or wireless telephones, VoiceXML forum was established to develop and promote the Voice eXtensible Markup Language (VoiceXML). VoiceXML simplifies the creation of personalized interactive voice response services on the Web, and allows voice and phone access to information on Web sites, call center databases. Also, it can utilize the Web-based technologies, such as CGI(Common Gateway Interface) scripts. In this paper, we have developed the voice portal service platform based on VoiceXML called TeleGateway. It enables integration of voice services with data services using the Automatic Speech Recognition (ASR) and Text-To-Speech (TTS) engines. Also, we have showed the various services on voice portal services.

• Journal of Korea Multimedia Society
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• v.6 no.6
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• pp.945-952
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• 2003

With the rapid growth of the B2B electronic commerce, digital catalogs for expressing product information effectively and exchanging it easily between companies become increasingly important. In this paper, we refer a product expression model to effectively integrate product information, and implement the model using XDK(XML Development Kit), which is given by Oracle 8i. We will first derive an XML DTD reflecting the model. We will then develop a system that stores and retrieves product information on/from Oracle 8i databases, which is written in XML, complying the XML DTD structure. Finally, We will give an experiment on the system.