By Doron Drusinsky
As platforms being built via and govt develop better and extra complicated, the necessity for more advantageous specification and verification methods and instruments turns into more and more very important. The developer and consumer should have entire self assurance that the layout produced is true, and that it meets forma improvement and verification criteria. during this textual content, UML specialist writer Dr. Doron Drusinsky compiles all of the newest details at the program of UML (Universal Modeling Language) statecharts, temporal good judgment, automata, and different complex instruments for run-time tracking and verification. this can be the 1st ebook that offers in particular with UML verification suggestions. this crucial details is brought in the context of real-life examples and strategies, relatively concentrating on nationwide safety purposes. a realistic textual content, in place of a high-level theoretical one, it emphasizes getting the process developer up-to-speed on utilizing the instruments valuable for day-by-day perform. ?· a pragmatic, tutorial-style textual content (other books in this subject talk about the instruments and formalisms purely theoretically) ?· comprises an unclassified case learn instance from the U.S. Missile safeguard venture ?·Accompanying CD-ROM contains resource code and re-useable statechart templates
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Extra resources for Modeling and Verification Using UML Statecharts: A Working Guide to Reactive System Design, Runtime Monitoring and Execution-based Model Checking
Flowcharting vs. ε-Transitions In Chapter 2 we will describe flowcharts within statecharts. Flowchart transitions resemble ε-transitions in that they are instantly traversed, without waiting for an external event. 4. Multitape FA 25 automatic nondeterminism. In other words, a deterministic statechart can include a flowchart whereas a DFA with ε-transitions is an oxymoron, because an ε-transition automatically induces more than one computation object. 4. Multitape FA A multitape FA is an FA in which the domain of discourse alphabet is the composition, or Cartesian product, of several “smaller,” independent alphabets.
The runtime monitor is then the equivalent of a decompression program, because it extracts scenarios from the compressed representation. 11. 11a–b Text decompression as an analogy to requirement specification and monitoring. 11. Finite State Machines We can think of an FA as a black box that generates a sequence of Boolean accept/reject (1/0) output streams. 0. In contrast an FSM generates output sequences using symbols taken from an output alphabet, Γ. In other words, rather than simply qualifying input scenarios as “good” or “bad,” an FSM actually responds to those scenarios with sequences of actions.
For example, a trace is said to be accepting if all its leaves are accepting. The two traces shown are not accepting because both have some nonaccepting leaves. An AFA A accepts a scenario s if the computation tree response of A to s contains an accepting trace. 4a) rejects seq2. Here, too, the requirement specified, described, or captured by an AFA is the set of scenarios accepted by A. Note the relationships among the four types of FA. Every DFA is by definition a special case of an NFA in which no next-state conflicts exist.
Modeling and Verification Using UML Statecharts: A Working Guide to Reactive System Design, Runtime Monitoring and Execution-based Model Checking by Doron Drusinsky