Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 12 of 12 for “"Integrity Constraints"”.
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A relational post-processing approach for forms recognition
… thesis, we look into the feasibility of using integrity constraints to detect and correct errors in forms recognition. The general idea is to construct a database of form values that can be used to direct recognition and consequently, make automatic correction.
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Viaduct : an interactive, very-high-level data manipulation language for a microcomputer-based database system.
… system. Additional security restrictions and integrity constraints usually found only on mainframe database management systems are provided by VIADUCT through the mechanism of a subschema generator.
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Path Constraints for Databases With or Without Schemas
… databases. It is capable of expressing natural integrity constraints that are not only a fundamental part of the semantics of the data, but are also important in query optimization. Path constraint implication is investigated for two models for semistructured data: the semistructured data model …
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The semantic database model as a basis for an automated database design tool
… this model is incorporated into the database as integrity constraints. A relation scheme is also generated from the specification. As a result of this research, insight has been gained into the advantages and shortcomings of the semantic database model, and some principles for 'good' data models …
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A database query language for operations on graphical objects
… complex structures.<br/><br/>The importance of integrity constraints is discussed and some ideas for the provision of user defined constraints are put forward.
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Design Foundations of Graph Databases
… shortcomings of the relational data model for integrity management. One fundamental goal in database design is to eliminate redundancy, yet even Inclusion Dependency Normal Form relies on attribute duplication introduced through foreign keys to establish referential integrity. Interestingly, …
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Performance Modelling of Database Designs using a Queueing Networks Approach. An investigation in the performance modelling and evaluation of detailed database designs using queueing network models.
… of active database rules and referential integrity constraints.
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Fundamentals and applications of order dependencies
… new ones. Order dependencies can be declared as integrity constraints, and they can be detected automatically for many types of SQL functions and algebraic expressions. We present optimization techniques using ODs for queries that involve join, order by, group by, partition by, and distinct. …
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Integration of heterogeneous data types using self organizing maps
… aid in manual or automated constructions of data integrity constraints in data cleaning or schema mappings for data integration.
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Information Quality Requirements Engineering: a Goal-based Modeling and Reasoning Approach
… problems in the literature (e.g., checksum, integrity constraints, etc.), but most of them propose solutions that are able to address the technical aspects of IQ, and seem to be limited in addressing social and organizational aspects. In other words, these techniques do not satisfy the needs …
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Synthesizing Linked Data and Detecting Per-Query Gaps Under Differential Privacy
… links between relations, subject to cardinality constraints (CCs) and integrity constraints (ICs), and (2) estimating per-query error, so a user can know if their queries are answered reliably on the synthetic data. More specifically, the former problem pertains to imputing a missing foreign key …
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The design of a data model (DM) for managing durability index (DI) results for national road infrastructure
… must support and ensure the accuracy and integrity of the information as well as accommodate data processing and reporting requirements. An explanation and critique of the current durability specification has also been presented since information is required on how to join information in …