DOPROPC: a domain property pattern system helping to specify control system requirements

1. DOPROPC: a domain property pattern system helping to specify control system requirements Fan Wu Hehua Zhang Ming Gu School of Software, Tsinghua University Beijing, China

2. Outline • Introduction • Overview of DOPROPC property patterns • Main conclusions of this paper • Future work

3. Introduction • Model checking provides means to validate the correctness of systems. It is often desired by safety critical control systems. However, it hasn’t been widely used in industry. • A primary cause is that industry experts are not familiar with formal logics.

4. Introduction • To overcome this difficulty, Dwyer et al.[1] firstly developed a pattern system for property specification. • The property patterns are high-level abstractions of frequently used temporal logic formulae.

5. Introduction • Although property patterns have already been in the abstract level, we found there is still a long distance from requirements to them. • Using Property pattern is usually difficult to industrial engineers, since it also needs knowledge about formal semantics.

6. Introduction • we come up with an idea: using what industrial engineers are most familiar with -domain knowledge- to do the work. • That is to say adding domain knowledge to property patterns which can be a bridge between domain knowledge and formal semantics.

7. DOPROPC property patterns • We developed DOPROPC as a two layer property pattern system.

8. DOPROPC—Bottom layer • The bottom layer depends on qualitative property patterns [1], real-time property patterns [2, 3] and probabilistic property patterns [4]. • We merge these three patterns together to gain an overall view.

9. DOPROPC—Bottom layer TABLE I. Basic property patterns • 2 Categories, 15 property patterns

10. DOPROPC—Bottom layer TABLE II. Absence Pattern • Each pattern includes four parts elements, Table II shows Absence pattern as an example.

11. DOPROPC—Top layer • We concluded 39 domain property patterns of control systems, which are classified into 12 categories. • The patterns are generalized from 104 properties of several real control systems.

12. DOPROPC—Top layer • 12 domain property categories:

13. DOPROPC—Top layer • Each pattern includes five parts elements, Table III shows an example. TABLE III. ANALOG QUANTITY 2 Domain Property Pattern

14. Conclusions • Our work has three contributions: • merging existent property patterns [1-5] as a full-scale basic property pattern system; • presenting a domain based property patterns of control; • developed a specification editor to help users to use DOPROPC easily, but for the space limitation, we haven’t introduced the editor in this paper.

15. Future work • Optimize domain property patterns of control systems. • Try to conclude a methodology from summarizing different domain property patterns as a general method to help different domain experts to develop their own domain property patterns.

16. References [1] M. B. Dwyer, G. S. Avrunin, and J. C. Corbett. Patterns in property specifications for finite-state verification. In Proceedings of the 1999 International Conference on Software Engineering (ICSE’99), 1999:411–421. [2] V. Gruhn and R. Laue. Patterns for timed property specifications. Electr. Not. Theor. Comp. Sci, 2006, 153(2):117–133. [3] S. Konrad and B. H. C. Cheng. Real-time specification patterns. In G.-C. Roman, W. G. Griswold, and B. Nuseibeh, editors, 27th Int. Conf. on Software Engineering, ICSE 05, 2005:372–381. [4] L. Grunske. Specification patterns for probabilistic quality properties. In Robby, editor, 30th International Conference on Software Engineering (ICSE 2008), 2008:31–40. [5] Gruhn V. Laue R. Specification Patterns for Time-Related Properties. In 12th International Symposium on Temporal Representation and Reasoning (2005) 189 - 191, Burlington, Vermont, USA.

17. Q&A • Any questions,please contact wufan0924@yahoo.com.cn • Thankyou!