Data Annotation Models
نویسندگان
چکیده
This paper addresses the problem of the unsuitability of most relational databases to express data annotations by defining data annotation models that allow users to annotate relational data at five levels database, relation, column, tuple, and cell. These models are structured using Extensible Markup Language (XML). The most important feature of these models is that they do not require any structural or schematic changes to the underlying database. It is common knowledge that database administrators (DBAs) are very resistant to making any structural or schematic changes to their deployed databases. Moreover, these models are simple to understand, flexible, extensible, customizable, databaseneutral, and platform-independent. These models also allow users to cross-reference related annotations. Simplicity and the ease of understanding is the main motivation for the design of the data annotation models presented in this paper.
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