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The Study of EPDM Data Dictionary Constructing and Model Management Based on the Data Element

Author: ChenYongFang
Tutor: YuanMan
School: Northeast University of Petroleum
Course: Applied Computer Technology
Keywords: Data element Data Dictionary Element model EPDM Synchronous
CLC: TP315
Type: Master's thesis
Year: 2011
Downloads: 57
Quote: 1
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Abstract


Of oil in order to achieve the integration of exploration and development, design and build EPDM data dictionary, but the dictionary is the name, type, value, and semantics is not clear, the need to be perfect reconstructed. And the current management of the data dictionary is only in the document dictionary shared only mutual circulated document, therefore, the urgent need to develop a tool to achieve the dictionary storage and automated management, but also to facilitate the sharing of data dictionary. The main topic is to address the problem. This paper first in-depth study of the data element theory, combined with the analysis of the data elements in the exploration and development of the data dictionary, data element framework, which extract the six categories of objects word, 57-class features the word, according to internationally recognized the word said word data element analysis, based on the composition of the structure of the data element can reverse build data element. Then for EPDM data dictionary data elements between the name, type, value conflict, and semantic ambiguity problem, using the theory of data elements and data element standardization method standardized data element problem analysis integration and improve the data dictionary The logical structure, thus achieving reconstruction of EPDM data dictionary. EPDM data dictionary for the refined, according to the dictionary management needs to build the the dictionary storage element model; exist for the physical model and the logical model of the data dictionary has been applied at the same time is not synchronized problem and developed a variety of maintenance rules, and build the rule element model element model developed for managing users; according to the permission of the management and maintenance of the data dictionary; constructed in accordance with the demand of the log management log management element model. Based on these element model combined with the data dictionary management and maintenance needs, design and development of a data dictionary to manage and maintain the system, and the management and maintenance of the data dictionary and to achieve synchronization maintenance of logical and physical models of the data dictionary. For later expansion of the perfection of the data dictionary or dictionary provides a method, system design and development of the storage of the data dictionary, adding, editing, and data repeal achieve automation to facilitate the management and internal data dictionary or between enterprises, the sharing of the data dictionary. The system has been applied in the the Daqing oilfield data center data management, and achieved certain results, there are great prospects for development.

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