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Specification and Description Language (SDL)
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Table of Contents:
Definition and Overview
1. Benefits of a Specification Language
2. History
3. SDL Characteristics
4. Theoretical Model and Structure
5. Sharing Information, Reuse, and Maintenance
6. Openness, Portability, Scalability, and Distributed Applications Openness
7. Graphical and Textual Notations and Application Areas
Self-Test
Glossary
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Self-Test
1. What distinguishes SDL from other graphical specification languages?
a. SDL is both natural and intuitive.
b. SDL is formal, object-oriented, and standardized.
c. SDL is modern.
d. SDL is used internationally.
2. Why is SDL particularly well-suited for the development of telecommunications applications?
a. SDL is able to describe real-time and distributed communicating systems.
b. SDL contains special telecommunications protocols.
c. SDL is well established.
d. SDL is owned by 15 large telecommunications companies.
3. In what way is object-orientation extended in SDL as compared to other object-oriented languages?
a. SDL introduces polymorphism.
b. SDL introduces data-oriented object-oriented classes.
c. SDL introduces testability.
d. SDL introduces object-oriented concepts for active objects.
4. How can time be simulated without access to the target system?
a. SDL time is abstract and can be mapped to the time of the target system.
b. The user can include a package that will provide this mechanism.
c. The user can assign signal and process priorities with special directives.
d. SDL can set timers that measure response times.
5. Why is it useful to be able to break down a system into encapsulated subsystems?
a. The subsystems can have different timers.
b. The SDL program can run on smaller computers.
c. It makes large team development easier.
d. The subsystems can be of different sizes.
6. The dynamic behavior in an SDL system is described in _______________.
a. the system/block hierarchy
b. the channels
c. the timers
d. the processes
7. Procedures outside an SDL system cannot be implemented in a language other than SDL.
a. true
b. false
8. Applications of SDL are confined to the telecommunications industry.
a. true
b. false
9. The graphical and textual notations of SDL are equivalent.
a. true
b. false
10. ADTs in SDL can be used for hiding data manipulation and algorithmic parts of a specification.
a. true
b. false

Glossary >>

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