{"title":"数据集成系统中的否定查询","authors":"Z. Majkic","doi":"10.1109/IDEAS.2005.47","DOIUrl":null,"url":null,"abstract":"Data integration is the problem of combining data residing at different sources, and providing the user with a unified view of these data. It is characterized by an architecture based on a global schema, with the set of integrity constraints, and a set of sources. In this paper, we investigate the way in which Closed World Assumption on a source data base can be coherently propagated to the global schema. The problem to resolve is directly connected by the fact that a global schema has a number (possibly infinite) of minimal models, caused by the incompleteness of source databases w.r.t. the integrity constraints over global schema. The aim of this preliminary work is to open the perspective for query language with negation in data integration framework.","PeriodicalId":357591,"journal":{"name":"9th International Database Engineering & Application Symposium (IDEAS'05)","volume":"53 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2005-07-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"7","resultStr":"{\"title\":\"Querying with negation in data integration systems\",\"authors\":\"Z. Majkic\",\"doi\":\"10.1109/IDEAS.2005.47\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"Data integration is the problem of combining data residing at different sources, and providing the user with a unified view of these data. It is characterized by an architecture based on a global schema, with the set of integrity constraints, and a set of sources. In this paper, we investigate the way in which Closed World Assumption on a source data base can be coherently propagated to the global schema. The problem to resolve is directly connected by the fact that a global schema has a number (possibly infinite) of minimal models, caused by the incompleteness of source databases w.r.t. the integrity constraints over global schema. The aim of this preliminary work is to open the perspective for query language with negation in data integration framework.\",\"PeriodicalId\":357591,\"journal\":{\"name\":\"9th International Database Engineering & Application Symposium (IDEAS'05)\",\"volume\":\"53 1\",\"pages\":\"0\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2005-07-25\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"7\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"9th International Database Engineering & Application Symposium (IDEAS'05)\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.1109/IDEAS.2005.47\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"9th International Database Engineering & Application Symposium (IDEAS'05)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/IDEAS.2005.47","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Querying with negation in data integration systems
Data integration is the problem of combining data residing at different sources, and providing the user with a unified view of these data. It is characterized by an architecture based on a global schema, with the set of integrity constraints, and a set of sources. In this paper, we investigate the way in which Closed World Assumption on a source data base can be coherently propagated to the global schema. The problem to resolve is directly connected by the fact that a global schema has a number (possibly infinite) of minimal models, caused by the incompleteness of source databases w.r.t. the integrity constraints over global schema. The aim of this preliminary work is to open the perspective for query language with negation in data integration framework.