entity-dependent relational schema中文意思是什麼

entity-dependent relational schema解釋
實體依賴關系數據模型

  • entity: n. 1. 實體;統一體。2. 存在(物)。3. (有別于屬性等的)本質。
  • dependent: adj. 1. 依靠的,依賴的。2. 從屬的,隸屬的,【語法】從屬的。3. 由…決定的。4. 下垂的,懸吊的。n. 1. 受贍養者,靠人生活的人。2. 扈從,侍從。3. 依存[從屬]物。
  • relational: adj. 有關系的;親戚的;(特指語法上)表示關系的。adv. -ly
  • schema: n (pl schemata )1 圖解;圖表;略圖。2 摘要,一覽;大要,大意;綱要,要略。3 【邏輯學】(三段論...

※英文詞彙entity-dependent relational schema在字典百科英英字典中的解釋。

  1. Aiming at this problem, the main research issues and achievements in this paper are as follows : bi - directional data transformation between rdb and xml with semantic constraints preserved for most of existing researches on static data transformation between xml and rdb, dtd is taken as the schema description language for xml, and the semantic constraints are often lost during the transformation process. to overcome these disadvantages, the author adopts xml - schema, a standard schema description language proposed by w3c to replace dtd, as the description method owing to its more powerful functions than dtd, and of course with the syntax much more complicated. after analyzing the constraints characteristics in both xml - schema and relational schema, a semantic constraints - preserved algorithm is proposed which can realize the bi - directional schema mapping between rdb and xml through a formalized description of xml based on regular tree and a general expression for relational schema based on direct graph approach

    保留語義約束的xml與rdb雙向靜態數據轉換技術現有研究大多採用dtd ( documenttypedefinition ,文檔類型定義)作為xml的模式描述語言,並且在模式映射過程中丟失語義約束信息,本文分析了xml - schema ( xml - schema採用與dtd完全不同的語法,數據描述能力更強同時也更為復雜,已被w3c確定為替代dtd作為xml模式描述語言的標準)及關系模式的語義約束特徵,通過基於正則樹的xml形式化描述方法以及基於有向圖的一般關系模式表示方法的研究,建立保留語義約束的xml - schema與關系模式的雙向模式映射演算法,實現了xml與rdb的雙向數據轉換,較好地解決了xml與rdb在靜態數據轉換層面的數據集成問題,可有效滿足企業大量rdb數據面向xml的發布以及與日俱增的xml數據存入rdb的應用需求。
  2. The mapping rule from express data schema to relational databases schema is studied. the translation of the different semantic data types of express into the data definition language of sql is discussed. the persistency of step data in relational databases is realized based on an entity instance manager in working form

    論文對express信息模型到關系數據庫模型的映射規則進行了研究,詳細分析了express語言的不同數據類型到sql數據類型的轉化方法,並對內存實現方式的產品數據倉庫的結構、功能進行了研究,闡述了基於關系數據庫的實體實例索引表的建立方法。
  3. The algorithms for conversion between relational schema and xml schema make enterprise easily to publish its product data information on internet / intranet, and provide a powerful technical support for advanced integration among enterprise heterogenous data sources

    關系模式與xml相互轉換演算法使得企業能夠方便地面向internet intranet發布數據,為企業異構數據源在更高層次上的集成提供了技術基礎。
  4. It is a feasible way to manager spatial objects by utilizing relational database in the gis applications. we have brought to octa - tree index structure for managering spatial data efficiently in relational schema. by space filling curve, z - curve, we mapped rsdd to 1 - dimensional linear sp

    為了在關系模式下有效地對空間數據進行處理,論文提出了八分樹的索引結構,並利用空間填充z一曲線把rsdd空間映射到一維空間,從而建立起了空間對象的索引順序。
  5. Finally, two application components to the conversion between relational schema and xml schema are builded, and an uniformed tool for conversion among heterogeneous relational database systems is developped

    最後就關系模式與xml的轉換建立了兩個應用組件,並開發出了異構關系數據統一轉換工具。
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