C. Batini, M. Lenzerini, and S. B. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 15(4):323--364, 1986.  Home/Search   Document Not in Database   Summary   Related Articles   Check

....Semantic annotations link objects to collection of domain concepts, bringing media to world concepts translation. Besides the user interface and the functionality of the system, distributed storage and access are another important issue in database systems, posing new challenges [Dayal 84] Batini 86] Sheth 90] Ahmed 91] Zhou 94] Hypermedia systems combine multimedia richness in datatypes with an elegant way of navigating through data in a content based manner 4 in a decentralized environment [ACM HyperMedia 94] and even address the semantics of time and context [Hardman 94] Many ....

Batini C., M. Lenzerini and S. B. Navathe, " A comparitive analysis of methodologies for database schema integration", ACM Computing Surveys 18(4), December 1986.

....often appears to be a main component of conceptual design which is itself a part of the overall activity of software design. This explains the significant interest in schema integration methodologies: a vast diversity of various approaches, techniques and tools were proposed (see, eg, surveys [1, 11, 10]) Moreover, to date the value of the issue has increased greatly due to the tendency of organizing modern (and of the nearest future) information systems into federal environments where schema and data integration are among primary questions. The main difficulty in view integration consists in ....

....connecting local schemas but not captured by any of them. All this constitutes a heuristic and hard to formalize nature of the subject and leads to an abundance of ad hoc solutions and methodologies (see also [9] A lot of approaches to classifying and managing structural conflicts were proposed ([3, 1, 8, 12] and others) the most fundamental to date research is that one by Spaccapietra et al. ( 14, 13] where a taxonomy distinguishing semantic, descriptional, structural and heterogeneity conflicts was suggested. However, the taxonomy appears to be an informal description rather than a precise ....

C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

....is a function regularly performed at different levels and by different services depending on the organization of the FDBS environment. The value of the problem is well known, various approaches, techniques and sometimes tools were proposed (see, eg, 7, 22, 35, 36, 30, 29, 26] and surveys [2, 27]) In spite of the diversity of approaches, several common points can be well identified. Integration consists of schema integration composing a global schema from the set of local ones, and data integration computing virtual extension of the global schema. Schema integration is the key ....

....effective computer realization. 3 An example of view integration via sketches and equations To demonstrate main features of the approach we suggest we will consider a slight modification (convenient for expository purposes) of the library example of schema integration described in the survey [2]. Two views (universes of discourse) are presented by ERdiagrams depicted on Fig.2. We suppose further that views are overlapped as follows: book s are publication s and semantics of the left view relation book publisher coincides with semantics of the right view attribute Pub lisher . ....

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C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

....conceptual design which is itself a part of the overall activity of database design. This explains the significant interest in schema integration methodologies: a vast diversity of various approaches, techniques and sometimes tools were proposed (see, eg, 10, 30, 42, 43, 40, 39, 36] and surveys [4, 37, 33]) Moreover, to date the value of the issue has increased greatly due to the evident tendency of organizing modern (and of the nearest future) information systems on cooperative federal principals. Indeed, in the context of federated database systems (FDBS) integration is a function regularly ....

....local schemas but not captured by any of them. All this constitutes a heuristic and hard to formalize nature of the subject and leads to an abundance of ad hoc solutions and methodologies (see also [31] A lot of approaches to classifying and managing structural conflicts were proposed ([10, 4, 25, 38, 40] and others) the most fundamental to date research is [39] where a taxonomy distinguishing semantic, descriptional, structural and heterogeneity conflicts was suggested. It appears however that this is rather an informal descrip 2 This phenomenon is often called semantic relativism. Moreover, a ....

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C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

....of CIS is that they have to be multilingual due to the autonomy of origin and initial development of their components, thus, heterogeneous view integration emerges. Significance of the problem is well known, various approaches, techniques and sometimes tools were proposed (see, eg, surveys [BLN86, SL90] and for more recent references [BDK92, YAD 92, SP91, SPD92a, WHW90] However, the overall peculiarity of the situation consists in an abundance of ad hoc approaches due to the lack of a formal specification framework. A characteristic Supported by Grant 94.315 from the Latvian Council ....

C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

....performed at different levels and by different services depending on the organization of the FDBS environment. Significance of the problem is well known, various approaches, techniques and sometimes tools were proposed (see, eg, DH84, Mot87, WHW90, YAD 92, SPD92b, SPD92a, SST92] and surveys [BLN86, SL90] In spite of the diversity of approaches, several common points can be well identified. Integration consists of schema integration composing a global schema from the set of local ones, Supported by Grant 94.315 from the Latvian Council of Science LFS1 : LFSk Federated Users ....

C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

....is a function regularly performed at different levels and by different services depending on the organization of the FDBS environment. Significance of the problem is well known, various approaches, techniques and sometimes tools were proposed (see, eg, 11, 21, 33, 34, 28, 27, 23] and surveys [4, 25]) In spite of the diversity of approaches, several common points can be well identified. Integration consists of schema integration composing a global schema from the set of local ones, and data integration computing virtual extension of the global schema. In practice this means setting a ....

....III of integration while the former case to the level II. To demonstrate main features of our approach in a more involved situation than above, we will consider a slight modification (convenient for expository purposes) of the library example of schema integration described in the survey [4]. Upsilon Sigma Xi Pi Integer oe month ff Omega Phi Psi Date Upsilon Sigma Upsilon Sigma r r r Upsilon Sigma Xi Pi Integer oe day Upsilon Sigma Xi Pi Integer oe year Person oe bdate Upsilon Sigma Xi Pi String oe name ff Omega Phi Psi fM;Fg sex ....

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C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

....databases Schema integration is the merging or apparent merging of schemas from different databases into a single unified schema, allowing queries to be made between databases. A good survey (though to early for OO) of integration and a discussion of the problems involved is given in [7], integration with respect to relational OO models are discussed in [48] 34] and a logical treatment is given in [41] 7] distinguishes two types of integration: 1. View integration can be performed at different parts of the database design life cycle. Its goal is to produce an integrated ....

....unified schema, allowing queries to be made between databases. A good survey (though to early for OO) of integration and a discussion of the problems involved is given in [7] integration with respect to relational OO models are discussed in [48] 34] and a logical treatment is given in [41] [7] distinguishes two types of integration: 1. View integration can be performed at different parts of the database design life cycle. Its goal is to produce an integrated schema starting from several application views that have been produced independently. 2. Database integration (in distributed ....

C. Batini, M. Lenzerini, and S.B. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, December 1986.

....in each of the specifications, and that makes it hard to combine the given specifications into one large specification. This problem of combining data specifications is called the view integration problem in the database literature, and has been studied extensively. We refer the reader to [6] for a survey. The usual approach is to develop heuristic algorithms which try to identify the equivalent subspecifications, and then leave it to a database designer to decide which subspecifications are indeed equivalent and which are not. A provably correct algorithm (in contrast with a ....

C. Batini, M. Lenzerini, S.B. Navathe. "A comparitive analysis of methodologies for database schema integration" ACM Computing Surveys, Vol. 15, nr. 4, 1986, pp. 323--364.

....is, building the integrated schema whose extent can be computed. This language should be universal in capturing the diversity of all possible situations of correspondence between local DBs. These problems are known, and various approaches, techniques, and tools have been proposed (see the surveys [3, 16, 14]) It is worth noting that majority of the existing approaches aim at integration within one or another data model, so the heterogeneuos integration remains outside their scope. Even structural conflicts within a sufficiently rich (in its collection of modeling constructs) data model is still a ....

C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

.... significant efforts as an abundance of the literature on the subject shows, see,eg, 12] and references therein) 6 It is remarkable that conceptual advantages of the sketch framework provide an effective solution of an extremely important practical problem of heterogeneuos view integration (see [3, 17] for a survey and [19, 18, 4] for further references) The latter always was a challenge to both semantic modeling theory and practice while sketches actually provide a real possibility to handle heterogeneity and semantic conflicts in a effective and consistent way this was demonstrated in [7, ....

C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

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C. Batini, M. Lenzerini, and S. B. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 15(4):323--364, 1986.

No context found.

C. Batini, M. Lenzerini, and S. Navathe. A comparitive analysis of methodologies for database schema integration. ACM Computing Surveys, 18(4):323--364, 1986.

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