• Title/Summary/Keyword: Schema Mapping

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STEP Architecture와 개요

  • 한순흥
    • Proceedings of the CALSEC Conference
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    • 1997.11a
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    • pp.333-346
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    • 1997
  • AP Modularization $\circledcirc$ PDES $\circledcirc$ Modular extension to AP203: plug & play schema subsets $\circledcirc$ AM (appl. module) is an interpreted model $\circledcirc$ Similar to AIC $\circledcirc$ Use Express-X instead of mapping table $\circledcirc$ Building Blocks $\circledcirc$ Physical analogy: Sub-assembly(omitted)

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An XML Structure Translation System using Schema Structure Data Mapping (스키마 구조 데이타 매핑을 이용한 XML 구조변환 시스템)

  • 송종철;김창수;정회경
    • Journal of KIISE:Computing Practices and Letters
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    • v.10 no.5
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    • pp.406-418
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    • 2004
  • Last days, various kinds of applications and system were individually introduced into specific groups or enterprises by different objective without considering interoperability among those. However, the environment for data processing is changing rapidly in these days. And now the necessity is growing to integrate and couple applications and system in the process dimension for more flexible and quicker data processing on these application programs and system. When integrating these application programs or system, an integration based on XML is recommended as it is one of good methods which will the additional cost and satisfy the requirements of the integration. This is because the XML is not only device-independent data type which can be used any platform, but also it uses XSLT, the document conversion standard established by W3C, which allows easy data conversion from one to another type on occasion of demands. This paper studies a design and implementation of system to convert XML structure. This system shows the structure of source- side providing data and destination-side processing data with using XML schema that defines structural information of a XML document. And this system defines the structure relationship of desired form as mapping structural information and data. This system creates the XSLT document that defines conversion rule between two structures based information which is defined. The XSLT document which is created as described above will convert data to be appropriate to the structure of the destination- side. By implementing this system, it is able to apply a document into various kinds of structure without considering specific system or platform and it is able to construct XSLT document to which meaning of desired form can be given. This paper aims to offer a process conversion between documents and to improve interoperability and scalability, so that we can contribute to build XML document processing environment

An RDB to RDF Mapping System Considering Semantic Relations of RDB Components (관계형 데이터베이스 구성 요소의 의미 관계를 고려한 RDB to RDF 매핑 시스템)

  • Sung, Hajung;Gim, Jangwon;Lee, Sukhoon;Baik, Doo-Kwon
    • KIPS Transactions on Software and Data Engineering
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    • v.3 no.1
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    • pp.19-30
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    • 2014
  • For the expansion of the Semantic Web, studies in converting the data stored in the relational database into the ontology are actively in process. Such studies mainly use an RDB to RDF mapping model, the model to map relational database components to RDF components. However, pre-proposed mapping models have got different expression modes and these damage the accessibility and reusability of the users. As a consequence, the necessity of the standardized mapping language was raised and the W3C suggested the R2RML as the standard mapping language for the RDB to RDF model. The R2RML has a characteristic that converts only the relational database schema data to RDF. For the same reasons above, the ontology about the relation data between table name and column name of the relational database cannot be added. In this paper, we propose an RDB to RDF mapping system considering semantic relations of RDB components in order to solve the above issue. The proposed system generates the mapping data by adding the RDFS attribute data into the schema data defined by the R2RML in the relational database. This mapping data converts the data stored in the relational database into RDF which includes the RDFS attribute data. In this paper, we implement the proposed system as a Java-based prototype, perform the experiment which converts the data stored in the relational database into RDF for the comparison evaluation purpose and compare the results against D2RQ, RDBToOnto and Morph. The proposed system expresses semantic relations which has richer converted ontology than any other studies and shows the best performance in data conversion time.

The Design of Data Grid Wrapper for Integrated Retrieve based on XMDR (XMDR 기반의 통합 검색을 위한 데이터 그리드 Wrapper 설계)

  • Hwang, Chi-Gon;Jung, Kye-Dong;Choi, Young-Keun
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.12 no.5
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    • pp.921-929
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    • 2008
  • Recently, many researches have been conducted to solve data heterogeneity as a way for data integration. The elements of the system that we suggest are an XMDR wrapper and XMDR Repository. XMDR wrapper solves the heterogeneity of the existing system by creating the interface based on the standard information of XMDR, and performing the inter-conversion between global XMDR query and local query using mapping data on standard information and local schema. XMDR Repository are composed of XMDR which manages the mapping data on standard information and local schema, and of Proxy DB which saves the accomplished results. With XMDR wrapper and XMDR Repository, users can use the same interface, and they need not conduct repeated queries since XMDR wrapper not only solves the heterogeneity of the schema using the meta-semantic ontology of XMDR, but also considers the heterogeneity accompanying the meaning of the value through instance semantic ontology. Therefore, in this paper we suggest the grid wrapper for the solution of data heterogeneity and efficient data integration.

Design and frnplernentation of a Query Processing Algorithm for Dtstributed Semistructlred Documents Retrieval with Metadata hterface (메타데이타 인터페이스를 이용한 분산된 반구조적 문서 검색을 위한 질의처리 알고리즘 설계 및 구현)

  • Choe Cuija;Nam Young-Kwang
    • Journal of KIISE:Software and Applications
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    • v.32 no.6
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    • pp.554-569
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    • 2005
  • In the semistructured distributed documents, it is very difficult to formalize and implement the query processing system due to the lack of structure and rule of the data. In order to precisely retrieve and process the heterogeneous semistructured documents, it is required to handle multiple mappings such as 1:1, 1:W and W:1 on an element simultaneously and to generate the schema from the distributed documents. In this paper, we have proposed an query processing algorithm for querying and answering on the heterogeneous semistructured data or documents over distributed systems and implemented with a metadata interface. The algorithm for generating local queries from the global query consists of mapping between g1oba1 and local nodes, data transformation according to the mapping types, path substitution, and resolving the heterogeneity among nodes on a global input query with metadata information. The mapping, transformation, and path substitution algorithms between the global schema and the local schemas have been implemented the metadata interface called DBXMI (for Distributed Documents XML Metadata Interface). The nodes with the same node name and different mapping or meanings is resolved by automatically extracting node identification information from the local schema automatically. The system uses Quilt as its XML query language. An experiment testing is reported over 3 different OEM model semistructured restaurant documents. The prototype system is developed under Windows system with Java and JavaCC compiler.

Automatic Generation Module of IFC-based Structural Analysis Information Model Through 3-D Bridge Information Modeling (3차원 교량정보 모델링에 따른 IFC 기반 트러스교 구조해석정보 자동생성 모듈)

  • Yi, Jin-Hoon;Kim, Hyo-Jin;Lee, Sang-Ho
    • Proceedings of the Computational Structural Engineering Institute Conference
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    • 2007.04a
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    • pp.809-812
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    • 2007
  • Automatic generation method of structural analysis model data for a truss bridge is presented through 3-D bridge information modeling based on Industry Foundation Classes(IFC). The mapping schema is proposed between a steel bridge information model based on STEP and a truss bridge information model based on the IFC. The geometry information from mapping is presented by IFC model, and SAP 2000 that can import the IFC file performs the structural analysis. Numerical analysis for a truss bridge is performed in this paper.

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A Study on Developing XML Documents and RDB Mapping Using Tag Free XML Development Tools (Tag free XML 개발 툴을 이용한 XML 문서 개발과 RDB 매핑에 관한 연구)

  • Woo, Won-Taek
    • Journal of Korea Society of Industrial Information Systems
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    • v.11 no.5
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    • pp.37-52
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    • 2006
  • XML architecture is important to wireless or wired presentation. It is also important for data exchange between businesses. XML forces the separation of content from style and gives wired or wireless devices flexibility for interpretation. Separation of content, style, and logic is key to advanced architecture. XML can be exchanged among databases on multiple systems with presentation on wired or wireless devices. An XML schema might need to be defined, or an established DTD might need to be transformed to access a relational database on the server. The purpose of this study is to generate XML documents such as DTD, XML schema, RDB mapping using Tagfree's XML developer tools in order to experience whole processes mentioned above. Overall understanding of data structures of and database processing with XML documents, which is essential to XML programming and database processing, can be accomplished with this study without much endeavor to learn complex XML syntax. The future study can be extended on the subject of web programming with DOM or SAX API.

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Extracting OWL Ontology from XML instances via XML Schema

  • Pham, Thi Thu Thuy;Lee, Young-Koo;Lee, SungYoung
    • Proceedings of the Korea Information Processing Society Conference
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    • 2009.11a
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    • pp.801-802
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    • 2009
  • Currently, XML and its schema language have become the standard for data representation and information exchange format on the current web. Unfortunately, problems happen when integrating different data sources since XML mainly supports the document structure but lack consideration on sharing knowledge of data. Meanwhile, Semantic Web technologies, such as Web Ontology Language (OWL), can include the structure as well as the semantics of the data. Therefore, finding a way to integrate XML data as OWL ontology receives a high interest nowadays. In this paper we present a mapping notation to convert XML Schema to OWL domain knowledge and an effective method to transform XML instances into OWL individuals. While keeping the XML original structure, our work also adds more semantics for the XML document. Moreover, whole of the transformation processes are done automatically without any user interference. Further, our transforming approach provides the solution for duplicate element names in XML document which has not mentioned in the previous work. Our results in existing OWL syntaxes can be loaded immediately by OWL editors and Semantic Web applications.

A Study on Metadata Mapping for Semantic Interoperability (의미 호환을 위한 메타데이터 매핑 연구)

  • Ko, Young-Man;Seo, Tae-Sul;Lim, Tae-Hoon
    • Journal of the Korean Society for information Management
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    • v.24 no.4
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    • pp.223-238
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    • 2007
  • This paper contains an analysis of the methods that have been used to achieve or improve interoperability among metadata and discuss the possibilities and limits of semantic interoperability among metadata using crosswalk. After that a semantic metadata mapping process which is able to maximize the interoperability among metadata is suggested. The methodology consists of four steps such as identifying metadata schema, finding common data element concepts(DECs), grouping attributes by the DECs, and mapping into a table. An experimental application of the process was performed onto two human resource information metadata standards developed in Korea.