Abstract
The data flow diagram has been extensively used to model the data transformation aspects of proposed systems. However, previous definitions of the data flow diagram have not provided a comprehensive way to represent the interaction between the timing and control aspects of a system and its data transformation behavior. An extension of the data flow diagram called the transformation schema is described. This schema provides a notation and formation rules for building a comprehensive system model, and a set of execution rules to allow prediction of the behavior over time of a system modeled in this way. The notation and formation rules allow depiction of a system as a network of potentially concurrent `centers of activity' (transformations), and of data repositories (stores), linked by communication paths (flows). The execution rules provide a qualitative prediction rather than a quantitative one, describing the acceptance of inputs and the production of outputs by the transformations but not input and output values.
Keywords
Computer scienceData flow diagramSchema (genetic algorithms)NotationControl flowExtension (predicate logic)Transformation (genetics)Programming languageData transformationData miningTheoretical computer scienceDatabaseData warehouseInformation retrieval
Affiliated Institutions
Related Publications
Extending State Transition Diagrams for the Specification of Human–Computer Interaction
User Software Engineering is a methodology for the specification and implementation of interactive information systems. An early step in the methodology is the creation of a for...
Development of chemical markup language (CML) as a system for handling complex chemical content
We report the first fully operational system for managing complex chemical content entirely in interoperating XML-based markup languages. This involves the application of versio...
THE CHALLENGE OF PROVIDING ENVIRONMENTAL FLOW RULES TO SUSTAIN RIVER ECOSYSTEMS
Accounting for natural differences in flow variability among rivers, and understanding the importance of this for the protection of freshwater biodiversity and maintenance of go...
Production Workflow: Concepts and Techniques
1. Introduction. Business Processes. Business Processes as Enterprise Resource. Virtual Enterprises. Processes and Workflows. Dimensions of Workflow. User Support. Categories of...
<i>Ab initio</i>lattice dynamics and phase transformations of<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:mi mathvariant="normal">Zr</mml:mi><mml:msub><mml:mi mathvariant="normal">O</mml:mi><mml:mn>2</mml:mn></mml:msub></mml:mrow></mml:math>
Zirconia, $\mathrm{Zr}{\mathrm{O}}_{2}$, is one of the most important ceramic materials in modern technology. Its versatility is closely related to phase transformations. Althou...
Publication Info
- Year
- 1986
- Type
- article
- Volume
- SE-12
- Issue
- 2
- Pages
- 198-210
- Citations
- 248
- Access
- Closed
External Links
Social Impact
Altmetric
PlumX Metrics
Social media, news, blog, policy document mentions
Citation Metrics
248
OpenAlex
Cite This
Paul T. Ward
(1986).
The transformation schema: An extension of the data flow diagram to represent control and timing.
IEEE Transactions on Software Engineering
, SE-12
(2)
, 198-210.
https://doi.org/10.1109/tse.1986.6312936
Identifiers
- DOI
- 10.1109/tse.1986.6312936