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We present a new approach to updateable, object-oriented, virtual (non-materialized) database views. It is based on the stack-based approach (SBA) to object-oriented query languages, which assumes the description of semantics in the form of abstract implementation of query/programming language constructs. The semantics is expressed in terms of naming, scoping and binding. It involves an environmental...
The paper presents briefly technical aspects of a new approach to object-oriented views. It is done in a semi-formal way based on simple, leading examples. The examples have to illustrate main features of a model. This approach relies on treating views via virtual objects, which are to have main properties of real ojects such as identity, their classes and operations. These notions are meant to be...
We adress the problem of null values and other forms of semi-structured data in object-oriented databases. Various aspects and issues concerning semi-structured data that are currently presented in the litarature are discussed in the paper. We propose a new universal approach to semi-structured data based on the idea of absent objects. The idea covers null values and union types and can be smoothly...
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