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Evolution of data models
[chapter]
1990
Lecture Notes in Computer Science
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Specifically, we describe a first evolutionary path from relations through nested relations and complex objects to object networks. ...
Relational, complex object, and object-oriented data models seem to establish three diverging directions and it appears hopeless to arrive at a new higher-level unifying data model as a new platform for ...
Challenging research questions in closely related areas include logical object network design and schema evolution, physical storage structure design, and optimization of the execution of object operations ...
doi:10.1007/3-540-53397-4_35
fatcat:qiebdruvnvgotjkjmpr57aohp4
A relational object model
[chapter]
1990
Lecture Notes in Computer Science
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In this paper, we show an evolutionary path from relational, essentially nested relational, to object-oriented data models and query languages. ...
Nested relations and complex objects are extensions which try to keep these advantages [1]. ...
104 from the uniformity of query representations from the object model all the way down to the storage structures. ...
doi:10.1007/3-540-53507-1_72
fatcat:5vg6mwzgpvhspjanpph32yn6oe
Conceptual Design of Document NoSQL Database with Formal Concept Analysis
2016
Acta Polytechnica Hungarica
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We have shown that FCA is a valuable visual analyzer for large-scale data, for example, offering a means of reading the possibility of nested scheme design from the built concept lattice. ...
Results of experiments using our method have proven that decisions affecting the modeling of data can affect application performance and database capacity. ...
In order to decide which data model to use we will firstly create the Object-Object context of our data and build the related concept lattice. ...
doi:10.12700/aph.13.2.2016.2.13
fatcat:jdnxlc6lwfenzpiz2dfayfk2fy
Page 53 of Journal of Research and Practice in Information Technology Vol. 23, Issue 2
[page]
1991
Journal of Research and Practice in Information Technology
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The idea of the nested relational model was developed around the need to extend the relational model to support complex objects in addition to atomic valued attributes. ...
Section 2 introduces the nested relational model and compares it with the standard relational model. ...
The two roles of nested relations in the DASDBS project
[chapter]
1989
Lecture Notes in Computer Science
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The paper gives an overview of the nested relational model and its two roles in the Darmstadt Database System (DASDBS) project, which was started in 1982 to develop an extensible database architecture ...
In its second role the nested relational algebra appears as a basic language for a KL-ONE-oriented semantic data model at an object-oriented layer upon the kernel. ...
For instance, if in the result ND we want to see only the department names and employee names from the above nested DEPT relation, we apply a projection to DEPT (we only want DNAME and something from EMP ...
doi:10.1007/3-540-51171-7_20
fatcat:v4e3sdpwgbavhcfhmcc55rmgue
Relational processing in conceptual combination and analogy
2008
Behavioral and Brain Sciences
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We evaluate whether evidence from conceptual combination supports the relational priming model of analogy. Representing relations implicitly as patterns of ...
That is, the pattern of activation required to transform NEST into BIRD NEST is highly similar to that required to transform CAGE into TURTLE CAGE but is relatively dissimilar to the transformation from ...
Indeed, object concepts are combined frequently in language (e.g., BIRD NEST), and like analogies, such conceptual combinations are understood by retrieving or inferring some relation (e.g., habitation ...
doi:10.1017/s0140525x08004548
fatcat:yp4zss2zo5d73e6p3ft6dlwdni
Object-oriented databases: definition and research directions
1990
IEEE Transactions on Knowledge and Data Engineering
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In this paper, we will attempt to contribute towards a foundation for object-oriented databases on the basis of the research results obtained from the ORION series of object-oriented database systems. ...
Index Terms-Class-composition hierarchy, integration of a programming language and database, class hierarchy, object-oriented data model, object-oriented databases, object-oriented database architecture ...
and a nested relation will not be given here). ...
doi:10.1109/69.60796
fatcat:6m7zpgmffbhr7eqnr6ijeuu3lq
A Unified Data and Service Integration Approach for Dynamic Business Collaboration
2012
2012 IEEE First International Conference on Services Economics
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In this paper, we propose a businss object model where data and its services are correlated, and a corresponding unified approach in which the modeling, composition and interaction of both data and service ...
The feasiblity and advantages of the approach is validated via a use case and a preliminary implementation. ...
Nested relational model is used to represent the internal structure and external view of a data object. ...
doi:10.1109/se.2012.16
fatcat:5dsep6nn6few5mw5j2t3l5ufpq
Measuring of Oracle Optimizer Performance for Object-Relational Database Entities
2008
˜Al-œRafidain journal for computer sciences and mathematics
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Relational model represents the object by using relations. ...
Relational model represents the object through the use of relations; on the other hand the main aim of ORDBMS model is to represent the special characteristics of OOP. ...
Relational model represents the object by using relations. ...
doi:10.33899/csmj.2008.163977
fatcat:2aknzwiejbc4bjp4xfnpo6yisi
Storage model for CDA documents
2003
36th Annual Hawaii International Conference on System Sciences, 2003. Proceedings of the
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In the relational design, queries were more complex to express than in the object-oriented design, but more efficient to execute. ...
In this research, issues arising with the design and implementation of a DB to support efficient retrieval from CDA documents and data mining for statistical analysis purposes are explored. ...
In Section 4, the DB design is presented by first developing an ER model and then translating it to the relational and object-relational data models. ...
doi:10.1109/hicss.2003.1174352
dblp:conf/hicss/LiangBS03
fatcat:jlye3p6sxfafdoqqwfojjqwoxi
An object algebra for object-oriented database systems
1993
ACM SIGMIS Database the DATABASE for Advances in Information Systems
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Object algebra is as powerful as relational and nested relational algebra. ...
In fact, due to message expressions that serve to handle both stored and derived values, object algebra provides greater computational power. ...
In other words, the nested relational model aims to represent complex objects by nesting relations, but still they are value-based and record-oriented models. ...
doi:10.1145/173798.173800
fatcat:nl3z4mwqmbagvbxgpugiis3oq4
Preserving Aggregation in an Object-Relational DBMS
[chapter]
2002
Lecture Notes in Computer Science
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In this paper, we propose models for implementation of aggregation in an Object-Relational Database Management System (ORDBMS) through the use of index clusters and nested tables. ...
We will also show how queries can be performed on index clusters and nested tables. ...
Background: Mapping Aggregation to Relational DBMS -Our Previous Work Object-relational transformation methodology is to transform an object-oriented conceptual model into relational tables. ...
doi:10.1007/3-540-36077-8_1
fatcat:3shgg27mjzhzpnirlq2a7k2rpi
Towards a Realistic Model of Indices in Object Bases
[chapter]
1996
Workshops in Computing
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The cost estimations show that conventional ordered indices, especially nested indices with object skeletons, can provide better performance than signature files. ...
A comparison of several indexing techniques for complex object in object-oriented database systems is presented, based on assumption of non-uniform distribution of attribute values. ...
Nested Inherited Indices The structure of nested inherited index differs from (ordinary) nested index only if indexed objects may belong to several different classes in the class hierarchy. ...
doi:10.1007/978-1-4471-1486-4_19
dblp:conf/adbis/Novikov95
fatcat:epaons3uzbb5voin4fcqdzvvby
Query Optimization in an OODBMS
[chapter]
1993
Informatik aktuell
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This paper describes the mapping of COCOON to DASDBS, a nested relational database kernel system, as an example OODBMS mapping to a complex storage system. ...
It is clearly crucial for the success of object-oriented databases to find effiĆ cient implementations that improve on the performance of relational sysĆ tems, rather than being powerful in terms of modeling ...
However notice, all join algorithms perform on nested storage structures, and are therefore variants of the algorithms as known from the relational model. ...
doi:10.1007/978-3-642-86096-6_18
dblp:conf/btw/RichS93
fatcat:rjm6iainvjaldarxm6rcwgctfm
Strengthening SAT-Based Validation of UML/OCL Models by Representing Collections as Relations
[chapter]
2012
Lecture Notes in Computer Science
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Transforming collections and strings into relations is particularly needed in the context of automatic model validation on the basis of a UML and OCL model transformation into relational logic. ...
for nesting, undefinedness and emptiness. ...
First, we use the model validator to automatically translate this UML and OCL model into a relational model, and initiate a search for valid instances in the context of 4, 8, and 12 person objects. ...
doi:10.1007/978-3-642-31491-9_5
fatcat:ndr7cc42ljeglikrtnssdy6j64
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