Category Archives: Foundations (rigour)

A New Account of Abstraction?

Software engineering could benefit from a more rigorous grounding in epistemology, e.g., for the account of abstraction. So, let’s see what we can learn from: Raymond Turner (2018) Computational Artifacts Continue reading

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Technical Artefacts and Software Requirements

The epistemic concept of “Technical Artefact” may prove useful for studying requirements engineering. It brings together the notions of the world as physical objects with the world of intentionally acting agents. Continue reading

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A simple relational Model

Modelling foundations: What does a simple diagram ‘thing – relation – thing’ say, in terms of logic? Continue reading

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Categories of semantic Models by Stachowiak

Categorisation by example of semantic models, i.e. models as we use them in software engineering etc, according to Herbert Stachowiak. Continue reading

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1 + x = 3 as a Query

Strongly reduced recap of basic software engineering concepts: Query, Result Set, Requirement. Continue reading

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Stachowiak on semantic Requirements Modelling

Excerpt of Herbert Stachowiak’s “Allgemeine Modelltheorie” (General Model Theory). Although this is on empirical-scientific models, it provides a foundation of semantic requirements modelling. Continue reading

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Reflections on Abstractions: From ‘Siamese’ Graphs to Concept Lattices

There is an elegant construct of dealing with ‘Siamese’ abstractions for object-attribute situations, from formal concept analysis. Where ‘Siamese’ means not-rhs-unique mapping of complete subgraphs. Continue reading

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Reflections on Abstractions: Subsumptions and Omissions

In addition to the recent posting ‘Abstractive and Functional Mappings’ we provide a simple visualisation of subsuming and omitting abstractions. Continue reading

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Reflections on Abstractions: Abstractive vs Functional Mappings

We introduce the concepts of subsuming and omitting mappings, and see how they are better suited for abstraction and modelling than the classical mathematical concept of functions. Continue reading

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Reflections on Abstractions: The Use Case trade-off

Based on the elementary terms of relational structures, this little example shows the basic trade-off of Use Cases: understandability vs redundancy. Continue reading

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