• Journal of KIISE:Databases
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• v.31 no.1
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• pp.48-60
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• 2004

XML documents consist of elements that are basic units of information. When the structure of XML documents is changed dynamically, we need to update structure information efficiently without changing the information of the index structure for fast retrieval. In this paper, we propose a dynamic indexing model scheme that updates the index structure in real time as the structure of XML documents is changed by insertion and deletion of elements. Our dynamic indexing model consists of a structure information representation method and a dynamic index structure. The structure information representation method supports various types of structure retrievals. Our dynamic index structure processes various structural queries efficiently. We show through various experiments that our method outperforms existing ones in processing various types of queries such as content based queries, structural queries and hybrid queries.

• Journal of the Korean Society for information Management
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• v.24 no.1 s.63
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• pp.103-120
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• 2007

Node is the semantic unit and a part of structured document. Information retrieval from structured documents offers an opportunity to go subdivided below the document level in search of relevant information, making any element in an structured document a retrievable unit. The node-based document retrieval constitutes several similarity calculating methods and the extended node retrieval method using structure information. Retrieval performance is hardly influenced by the methods for determining document similarity The extended node method outperformed the others as a whole.

• The Journal of Society for e-Business Studies
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• v.9 no.1
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• pp.21-38
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• 2004

With its recent popularity, Web is now considered as a huge repository of information. Most documents on the web have been created using HTML(Hyper Text Markup Language). Even though HTML is simple and easy to learn, it has several features that are obstacles to the efficient information retrieval. XML(eXtensible Markup Language) can provide a solution to such problems and in fact, has already been used in many applications, XML is a standard markup language for exchanging data on the web. It can describe a document structure freely by defining its DTD, which enables efficient integration and retrieval of data on the web. In this paper, we propose a versatile and efficient XML document manager. Its features include (i) form-based XML editor that enables easy creation of new XML documents, (ii) automatic document converter that can transform HTML documents with similar structure into XML documents automatically, and (iii) GUI-based DTD editor.

• Journal of KIISE:Databases
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• v.30 no.5
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• pp.494-506
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• 2003

Recently, explosive popularity of multimedia information has triggered the need for retrieving multimedia contents efficiently from the database including audio, video and images. In this paper, we propose an XML-based retrieval scheme and a data model that complement the weak aspects of annotation and conent based retrieval methods. The Property and hierarchy structure of image and video data are represented and manipulated based on the Multimedia Description Schema (MDS) that conforms to the MPEG-7 standard. For audio contents, pitch contours extracted from their acoustic features are converted into UDR string. Especially, to improve the retrieval performance, user's access pattern and frequency are utilized in the construction of an index. We have implemented a prototype system and evaluated its performance through various experiments.

• Journal of the Korean Society for information Management
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• v.26 no.4
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• pp.113-128
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• 2009

Generally, a user uses briefly summarized video data and text information to search video contents. To provide fast and accurate search tool for video contents in the process of searching video contents, this study proposes a method to search video clips which was partitioned from video contents. To manage and control video contents and metadata, the proposed method creates structural information based on XML on a video and metadata, and saves the information into XML database. With the saved information, when a user try to search video contents, the results of user's query to retrieve video contents would be provided through creating Xpath which has class structure information. Based on the proposed method, an information retrieval system for video clips was designed and implemented.

• The Transactions of the Korea Information Processing Society
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• v.7 no.7
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• pp.2020-2027
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• 2000

The hypertext document is used for information exchange in the Web environments. Its structure is considered as having graph structures with links, which makes nonlinear processing of documents possible. This paper proposes an indexing method for information retrieval system using XML links. We define new attributes that control links of a remote document and assign an unique identifier for the attribute of each link. Each identifier has a different weight according to its occurrence position that is local or remote documents. We index a word not only from a local document but a remote document based on the given weight. Experimental results show that the proposed method outperforms conventional retrieval systems that ignore links.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2004.05b
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• pp.424-428
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• 2004

Study related to a system that saves a n document, and to search is consisting actively and has a lot of cases to have left emphasis in the function that these systems efficiently save a XML document and can search. Also, It has a table or the storage structure which was especially designed in order to save a XML document and can save structure information of a document in addition to contents of a XML document together and can efficiently do content retrieval of a XML document or a structure search with an early base. As for this paper, a design implemented the data which the many different kinds of database that had currently used had with you so that did recycling and shared conversion and this XML file in Web, and output can become a XML format through various interrace.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.11 no.7
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• pp.1311-1317
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• 2007

Recently, due to the popularity and explosive growth of the Internet, the information exchange is increasing so rapidly over the Internet. Also the XML is becoming a standard as well as a major tool of data exchange on the Internet and thus we propose the new indexing technique for evaluating a path-oriented query and design and implementation of Path-oriented Query Processing System to give useful for users. In proposed indexing technique, which combined a binary trio structure with a path signature file to improve performance of XML document retrieval.

• The KIPS Transactions:PartD
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• v.8D no.5
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• pp.461-472
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• 2001

Recently, much research on XML query processing considering the structural characteristics of XML documents is conducted, focusing primarily on the development and/or extension of XML query languages and on query optimization for effective retrieval of XML documents. In the XML repository, the XML views derived from the underlying XML documents could be stored materialized for effective retrieval of XML documents, and could be capitalized on for XML query processing In this paper, assuming that the XML views defined in XQL are materialized in the repository, we investigate XQL query processing that capitalizes on them. We describe the storage structure of the XML repository which supports the materialized views, and propose an algorithm that determines whether the given XQL query can be processed with the relevant materialized view adn accordingly transforms the original query into one against it.

• Proceedings of the Korea Information Processing Society Conference
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• 2001.10a
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• pp.129-132
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• 2001

웹의 대중화와 컴퓨터 기술의 발달로 멀티미디어 데이터의 사용이 크게 증가하고 있지만, 사용자가 원하는 멀티미디어 데이터의 일부분과 해당 데이터의 구조정보를 검색하는 기능은 제공되고 있지 않다. 본 논문에서는 사용자가 원하는 내용을 포함하고 있는 멀티미디어 데이터를 검색하고, 그 데이터의 구조정보를 XML 문서 형태로 보여주기 위하여, 객체지향 데이터베이스 시스템을 이용하여 대용량의 멀티미디어 데이터와 해당 데이터를 표현한 XML 문서를 저장하고, 사용자의 질의를 처리하기 위한 효율적인 구조정보 검색 방법을 제안한다.