- 模式描述
- schema data description: 模式數(shù)據(jù)描述
- schema data description language: 模式數(shù)據(jù)描述語(yǔ)言
- schema description language: 模式描述語(yǔ)言骨架
- schema level description: 模式級(jí)描述
- state description schema: 狀態(tài)描述模式
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schema description中文什么意思
- 模式描述
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例句與用法
- 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(yǔ)義約束的xml與rdb雙向靜態(tài)數(shù)據(jù)轉(zhuǎn)換技術(shù)現(xiàn)有研究大多采用dtd(documenttypedefinition，文檔類型定義)作為xml的模式描述語(yǔ)言，并且在模式映射過(guò)程中丟失語(yǔ)義約束信息，本文分析了xml-schema(xml-schema采用與dtd完全不同的語(yǔ)法，數(shù)據(jù)描述能力更強(qiáng)同時(shí)也更為復(fù)雜，已被w3c確定為替代dtd作為xml模式描述語(yǔ)言的標(biāo)準(zhǔn))及關(guān)系模式的語(yǔ)義約束特征，通過(guò)基于正則樹(shù)的xml形式化描述方法以及基于有向圖的一般關(guān)系模式表示方法的研究，建立保留語(yǔ)義約束的xml-schema與關(guān)系模式的雙向模式映射算法，實(shí)現(xiàn)了xml與rdb的雙向數(shù)據(jù)轉(zhuǎn)換，較好地解決了xml與rdb在靜態(tài)數(shù)據(jù)轉(zhuǎn)換層面的數(shù)據(jù)集成問(wèn)題，可有效滿足企業(yè)大量rdb數(shù)據(jù)面向xml的發(fā)布以及與日俱增的xml數(shù)據(jù)存入rdb的應(yīng)用需求。 - 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(yǔ)義約束的xml與rdb雙向靜態(tài)數(shù)據(jù)轉(zhuǎn)換技術(shù)現(xiàn)有研究大多采用dtd(documenttypedefinition，文檔類型定義)作為xml的模式描述語(yǔ)言，并且在模式映射過(guò)程中丟失語(yǔ)義約束信息，本文分析了xml-schema(xml-schema采用與dtd完全不同的語(yǔ)法，數(shù)據(jù)描述能力更強(qiáng)同時(shí)也更為復(fù)雜，已被w3c確定為替代dtd作為xml模式描述語(yǔ)言的標(biāo)準(zhǔn))及關(guān)系模式的語(yǔ)義約束特征，通過(guò)基于正則樹(shù)的xml形式化描述方法以及基于有向圖的一般關(guān)系模式表示方法的研究，建立保留語(yǔ)義約束的xml-schema與關(guān)系模式的雙向模式映射算法，實(shí)現(xiàn)了xml與rdb的雙向數(shù)據(jù)轉(zhuǎn)換，較好地解決了xml與rdb在靜態(tài)數(shù)據(jù)轉(zhuǎn)換層面的數(shù)據(jù)集成問(wèn)題，可有效滿足企業(yè)大量rdb數(shù)據(jù)面向xml的發(fā)布以及與日俱增的xml數(shù)據(jù)存入rdb的應(yīng)用需求。 - virtual ontology data source shields the detail of low-leveldatasource, andprovides aconsistentaccessinterfacefortopperusers . wediscussedthemethodof transforming relation database to virtual ontology data source ( which is also called databasedeep annotation ) . we designed the database schema description language and mapping rulesdescriptionlanguage, andgavearesolventforrelationmodeling . at last, we bring out a framework of general natural language interface, and implement adatabasenaturallanguageinterface . makinguseofaspecificexample, wemadeanevaluationofthissystem
我們具體討論了從關(guān)系數(shù)據(jù)庫(kù)系統(tǒng)到虛擬本體數(shù)據(jù)源的轉(zhuǎn)換(也稱為數(shù)據(jù)庫(kù)深度注解),定義了關(guān)系數(shù)據(jù)庫(kù)的結(jié)構(gòu)知識(shí)描述語(yǔ)言和通用的映射規(guī)則描述語(yǔ)言,給出了多元關(guān)系建模的解決方案。