rrelational database modelsecuritycovert channelop-crating systemMechanisms called set-UID and set-GID are used to control access privileges for users on UNIX systems. When a program is running it will gen-erally execute with the same rights as the user who executed. When the set-UID or set...
Using relational model for representing information source results in scattered relations ofdata about the real world objects. In this paper an effective category model is presented to organize information according to their contents based on object-relational database. For the discussion of the ...
This paper presents an overview of a data model for complex objects called EXTREM (EXTended RElational Model). EXTREM is based on the semantic database model IFO [AbH EXTREM is compared with other...Heuer, AndreasA. Heuer. A data model for complex objects based on a semantic database model...
In this paper, the entity-relation data model for integrating spatio-temporal data is designed. In the design, spatio-temporal data can be effectively stored and spatiao-temporal analysis can be easily realized. 关键词: GIS;时空数据模型;相关数据库 DOI: 10.1007/BF02833882 被引量: 2 年份...
Nowadays, indexing data by ontological concepts represents a new approach for modeling and exploiting databases. These emergent architectures are called Ontology-Based DataBases (OBDB). In such systems, both the ontology (local ontology) and the related
building and publishing.By an alyzing one of the technologies SQml which get structured markup language and da tabase connected,we discuss the defects of applying structured markup language i nto RDBMS.We define the database system based on the structured markup language and design a model for ...
The Id property functions as the unique key in a relational database.Model classes can go anywhere in the project, but the Models folder is used by convention.Add a database contextThe database context is the main class that coordinates Entity Framework functionality for a data model. This ...
How to make relational database has the semantic character, and how to describe the semantic of object, are important problem during the application of semantic web. In this paper, a model of Ontology-Object-Relational mapping rules and algorithms was al
Object-relational database management and system domain model are all technical means accompanied by Internet of Things, cloud computing, and spatial data collection. Small data has evolved into the characteristics of big data, and the technical means also present the digital era, dealing with the ...
Structured data are stored in the relational database MySQL. All other storage, such as text files, is on the SAN. Since there are many relational queries and transaction processing involved in the system, it is necessary to choose a relational database to better meet the requirements. (2) ...