標(biāo)題: Titlebook: Entity-Relationship Approach - ER ‘92; 11th International C G. Pernul,AM. Tjoa Conference proceedings 1992 Springer-Verlag Berlin Heidelber [打印本頁(yè)] 作者: 里程表 時(shí)間: 2025-3-21 16:55
書(shū)目名稱(chēng)Entity-Relationship Approach - ER ‘92影響因子(影響力)
書(shū)目名稱(chēng)Entity-Relationship Approach - ER ‘92影響因子(影響力)學(xué)科排名
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書(shū)目名稱(chēng)Entity-Relationship Approach - ER ‘92網(wǎng)絡(luò)公開(kāi)度學(xué)科排名
書(shū)目名稱(chēng)Entity-Relationship Approach - ER ‘92被引頻次
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書(shū)目名稱(chēng)Entity-Relationship Approach - ER ‘92年度引用
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書(shū)目名稱(chēng)Entity-Relationship Approach - ER ‘92讀者反饋
書(shū)目名稱(chēng)Entity-Relationship Approach - ER ‘92讀者反饋學(xué)科排名
作者: Mere僅僅 時(shí)間: 2025-3-21 22:11 作者: troponins 時(shí)間: 2025-3-22 00:48
Local referential integrity,chema by using “l(fā)ocal object classes” as domains of relationships. A local object class is a set of objects belonging exclusively to some composite object. Local referential integrity is maintained if any relationship from within a composite object to one of its local classes references a current me作者: 乏味 時(shí)間: 2025-3-22 07:54
Embedding data modelling in a general architecture for integrated information systems,which are generic for a particular type of industry, can be used to improve the quality and reduce the development effort for enterprise-specific data models.[6] Their utilization should be incorporated into ISDMs and the corresponding CASE-tools. Furthermore, the architecture shows a clear need for作者: 脾氣暴躁的人 時(shí)間: 2025-3-22 12:41
The next ten years of modeling, methodologies, and tools,作者: CLAM 時(shí)間: 2025-3-22 16:42 作者: CLAM 時(shí)間: 2025-3-22 18:59
0302-9743 October 7-9, 1992. It containsthe full versions of all the 22 accepted papers selectedfrom in total 64 submissions; in addition, the twoinvitedtalks by Scheer and by Tsichritzis and others arerepresented asfull papers and the two other invitedspeakers contribute extendedabstracts.All the contributio作者: 提升 時(shí)間: 2025-3-22 22:55 作者: Notorious 時(shí)間: 2025-3-23 03:33 作者: JAUNT 時(shí)間: 2025-3-23 07:03
ered to obtain general expressive power. The major contribution of this paper is that, for every query specification with any depth of nesting of quantification, there is an equivalent . form which can be easily processed by database management systems.作者: 圓桶 時(shí)間: 2025-3-23 12:57 作者: 圍巾 時(shí)間: 2025-3-23 14:44 作者: Conflagration 時(shí)間: 2025-3-23 21:15 作者: IRK 時(shí)間: 2025-3-23 23:29 作者: vertebrate 時(shí)間: 2025-3-24 03:16 作者: Gourmet 時(shí)間: 2025-3-24 09:26 作者: 路標(biāo) 時(shí)間: 2025-3-24 12:01
HVDC in the Future Power Systems,ce and time overhead on instance level, but it turns out that data dictionary overhead also keeps within reasonable limits..Please note that the valence concept is not a complete data model by itself, but a relationship model which can be embedded in a wide range of data models.作者: 歪曲道理 時(shí)間: 2025-3-24 15:51 作者: 取之不竭 時(shí)間: 2025-3-24 20:31
Alexandra Wake,Drew Ambrose,Damian Grenfells, realizing incremental changes to the database schema and their propagation to data instances. We show, how each schema update of a given taxonomy is realized by direct updating of schema objects, and how this approach can be used to build a complete tool for database evolution.作者: DEMUR 時(shí)間: 2025-3-25 01:18
Conference proceedings 19929, 1992. It containsthe full versions of all the 22 accepted papers selectedfrom in total 64 submissions; in addition, the twoinvitedtalks by Scheer and by Tsichritzis and others arerepresented asfull papers and the two other invitedspeakers contribute extendedabstracts.All the contributions describ作者: Absenteeism 時(shí)間: 2025-3-25 06:12
Conference proceedings 1992of database research activities. In particular, thetopics database design aspects,object-orientation,integrity constraints, query languages, knowledge-basedtechniques, and development of new applications areaddressed.作者: Subdue 時(shí)間: 2025-3-25 08:37
0302-9743 widerange of database research activities. In particular, thetopics database design aspects,object-orientation,integrity constraints, query languages, knowledge-basedtechniques, and development of new applications areaddressed.978-3-540-56023-4978-3-540-47356-5Series ISSN 0302-9743 Series E-ISSN 1611-3349 作者: 淺灘 時(shí)間: 2025-3-25 13:22
Breathing is to live, to smell and to feel tasks and thus increases their effectiveness and productivity. The SEER-DTS methodology has been subjected to validation through a real-world case study and a laboratory experiment. Moreover, a computer-aided DDB design tool (Auto-DDB) which automates the SEER-DTS methodology has been prototyped.作者: 神經(jīng) 時(shí)間: 2025-3-25 19:18
Karel van Hulle,Leo van der Tashis viewpoint has other advantages. It keeps specifications and implementations consistent with one another, models an evolving system nicely, and avoids version percolation problems naturally. It also suggests a way to separate local and global issues in system design.作者: amyloid 時(shí)間: 2025-3-25 22:58 作者: 過(guò)時(shí) 時(shí)間: 2025-3-26 02:46
An entity-relationship-based methodology for distributed database design: An integrated approach to tasks and thus increases their effectiveness and productivity. The SEER-DTS methodology has been subjected to validation through a real-world case study and a laboratory experiment. Moreover, a computer-aided DDB design tool (Auto-DDB) which automates the SEER-DTS methodology has been prototyped.作者: inquisitive 時(shí)間: 2025-3-26 05:34 作者: nettle 時(shí)間: 2025-3-26 10:25 作者: 系列 時(shí)間: 2025-3-26 14:27 作者: Manifest 時(shí)間: 2025-3-26 17:15 作者: indemnify 時(shí)間: 2025-3-26 23:03 作者: Demulcent 時(shí)間: 2025-3-27 04:37
Meta object management and its application to database evolution,s, realizing incremental changes to the database schema and their propagation to data instances. We show, how each schema update of a given taxonomy is realized by direct updating of schema objects, and how this approach can be used to build a complete tool for database evolution.作者: 聯(lián)合 時(shí)間: 2025-3-27 07:55
Lecture Notes in Computer Sciencehttp://image.papertrans.cn/e/image/311661.jpg作者: 嘲弄 時(shí)間: 2025-3-27 11:13
https://doi.org/10.1007/3-540-56023-8Constraint; Data Modeling; Database Applications; Database Design; Database Management; Datenbank-Anwendu作者: 側(cè)面左右 時(shí)間: 2025-3-27 14:59
Diffraction Contrast in TEM Images,omplete lifecycle of a database as an interface model. For this purpose, the concepts of the ER-model need to be theoretically wellfounded. The aim of this paper is to show how the theoretical basis of one of the most important class of integrity constraints can be constructed and then used for the 作者: 不法行為 時(shí)間: 2025-3-27 19:44 作者: Oration 時(shí)間: 2025-3-27 22:03 作者: abysmal 時(shí)間: 2025-3-28 04:57
Carrier Transmission of Signals,e is stepwise so that clustered designs on different levels are achieved. Parenthood connections are used to build increasingly complex entity sets out of primitive ones. No semantical extensions of the original ER model are necessary because these connections are identified by their cardinalities a作者: Intact 時(shí)間: 2025-3-28 07:21 作者: 該得 時(shí)間: 2025-3-28 12:14 作者: 殺子女者 時(shí)間: 2025-3-28 15:48 作者: BURSA 時(shí)間: 2025-3-28 22:40
E. S. Garnett,G. Firnau,C. Nahmias, relationships, attributes, values, actors, messages, etc. Usually these words have a certain meaning and usually their usage is according to that meaning. In this paper we will describe how a Lexicon, containing these words and their meaning, can be used fruitfully when combined with a CASE tool.作者: 細(xì)查 時(shí)間: 2025-3-28 23:35 作者: 現(xiàn)代 時(shí)間: 2025-3-29 05:07
Karel van Hulle,Leo van der Tasierarchy of components that constitute a system as layers of alternating specification and implementation. If one considers the principles of abstraction and encapsulation, one can see that this viewpoint is quite natural. Abstraction implies that all implementations are implementations of . specifi作者: 金盤(pán)是高原 時(shí)間: 2025-3-29 10:28 作者: 內(nèi)疚 時(shí)間: 2025-3-29 15:11
Overall ideas are two basic constructs, one for universal (?) quantifier and another for existential (?) quantifier. Then a nesting feature is considered to obtain general expressive power. The major contribution of this paper is that, for every query specification with any depth of nesting of quan作者: 羅盤(pán) 時(shí)間: 2025-3-29 16:11
Cecilia Lwiindi Nedziwe,Oluwaseun Tella. The schema information is supplied as an enhanced entity relationship (EER) model which is transformed by a one-to-one mapping into a set of ground facts. The application data corresponding to the schema is also represented by ground facts in a single table. In order to check whether the applicati作者: Certainty 時(shí)間: 2025-3-29 21:34
Transnational Actors in Global Governanceer, we examine the problem of view update in Entity-Relationship based database management systems [17] where the conceptual schema is represented by a normal form ER diagram [16] and views may be modelled by ER diagrams. We develop a theory within the framework of the ER approach that characterizes作者: 歌曲 時(shí)間: 2025-3-30 00:37 作者: Override 時(shí)間: 2025-3-30 07:13
Alexandra Wake,Drew Ambrose,Damian Grenfell on an object-oriented data model, where three levels of objects are distinguished: ., and .. We discuss the prerequisites for applying the query and update operations of an object algebra uniformly on all three levels. As a sample application of the framework, we focus on database evolution, that i作者: 寄生蟲(chóng) 時(shí)間: 2025-3-30 08:48 作者: Extort 時(shí)間: 2025-3-30 15:32 作者: Incompetent 時(shí)間: 2025-3-30 19:09
Carrier Transmission of Signals,e is stepwise so that clustered designs on different levels are achieved. Parenthood connections are used to build increasingly complex entity sets out of primitive ones. No semantical extensions of the original ER model are necessary because these connections are identified by their cardinalities alone.作者: Tartar 時(shí)間: 2025-3-31 00:36 作者: nephritis 時(shí)間: 2025-3-31 02:08 作者: brachial-plexus 時(shí)間: 2025-3-31 08:12
,Entity tree clustering — A method for simplifying ER designs,e is stepwise so that clustered designs on different levels are achieved. Parenthood connections are used to build increasingly complex entity sets out of primitive ones. No semantical extensions of the original ER model are necessary because these connections are identified by their cardinalities alone.作者: 無(wú)畏 時(shí)間: 2025-3-31 13:16
The use of a lexicon to interpret ER diagrams: a LIKE project,, relationships, attributes, values, actors, messages, etc. Usually these words have a certain meaning and usually their usage is according to that meaning. In this paper we will describe how a Lexicon, containing these words and their meaning, can be used fruitfully when combined with a CASE tool.作者: Robust 時(shí)間: 2025-3-31 13:54
Transforming conceptual data models into an object model,ived mainly from an extended Entity-Relationship approach, but concepts from other semantic and object-oriented models have influenced its features. It is shown how high-level conceptual data models can be mapped to this model, and to what extent the object model subsumes classical modeling paradigms.作者: 表兩個(gè) 時(shí)間: 2025-3-31 17:47
Fundamentals of cardinality constraints,omplete lifecycle of a database as an interface model. For this purpose, the concepts of the ER-model need to be theoretically wellfounded. The aim of this paper is to show how the theoretical basis of one of the most important class of integrity constraints can be constructed and then used for the 作者: 固執(zhí)點(diǎn)好 時(shí)間: 2025-4-1 00:06
Evaluation of complex cardinality constraints, is type-based, admits variants and detailed cardinality specifications, and can cope with incomplete intermediate states. Nevertheless, the resulting syntax is easy to understand..In this paper, an implementation of the valence concept is outlined. Special emphasis has been placed on minimizing spa作者: Amplify 時(shí)間: 2025-4-1 03:15
Local referential integrity,te object. For example, in production planning an employee of some department may only be scheduled to work on machines belonging to the same department. Usually, such a constraint must be stated explicitly by a predicate as “add on” to a database schema. Object-oriented data models have become popu
