Do UML sequence diagrams show flow control?

Top PDF Do UML sequence diagrams show flow control?:

UML Tutorial: Sequence Diagrams.

UML Tutorial: Sequence Diagrams.

Figure 2: Sequence Diagram of Cellular Phone. The large rectangle that encloses the group of messages in the first sequence diagram defines an iteration. The looping condition for that iteration is shown at the bottom of the rectangle. Take a little time to inspect the two figures. You should be able to prove to yourself that they represent precisely the same information. Yet the two forms are radically different. The Sequence diagrams take up a bit more space, but are much easier to follow algorithmically. The Collaboration diagram shows the whole collaboration in one dense diagram, but obscures the algorithm to some extent. Which of the two you use depends upon the information you are trying to emphasize. Sometimes you really want to show the cohesiveness of a collaboration; other times you want to show the flow of the algorithm.
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A Dynamic Analysis Tool for Extracting UML 2 Sequence Diagrams

A Dynamic Analysis Tool for Extracting UML 2 Sequence Diagrams

A scenario describes a typical example of an execution trace and therefore control-flow statements and conditions are not specified. To better understand how these classes can be used to model a Java software system we present a very simple example. Let’s consider two classes A and B and we model the dynamic interaction where obj1, instance of class A, invokes method m2() of object obj2, instance of class B. This interaction can be represented by a sequence diagram as shown in Figure 2.

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Automatic Test Data Synthesis using UML Sequence Diagrams

Automatic Test Data Synthesis using UML Sequence Diagrams

However, they rely on the user to provide classification and test data selection. Hartmann et al. [26] address the problem of test data generation and execution of system tests from UML activity diagrams. The category partition method is considered as the underlying test data generation technique for their approach. A category is defined for all the variables in the diagram. Accordingly, they discuss annotations to describe variables, partitions for variable ranges, coverage require- ments etc. Based on these test requirements, equivalence classes in the system under test are identified. The test cases are created from the activity diagram by mapping its activities and transitions to partitions and choices such that all different paths of choices are covered. They provide evaluation of their experiments in comparison to the existing manual approach. However, the major concern with their approach is that the complex control structures such as concurrency, loops and their nested combinations are not addressed. In addition, simple predicates are evaluated as the branch predicates. In this respect, applying category partition to evaluate complex expressions is not explored.
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INTRODUCTION TO UML Understanding UML Diagrams

INTRODUCTION TO UML Understanding UML Diagrams

UMLSEQUENCE DIAGRAM Sequence diagrams are Interaction diagrams that are ordered by time; you read the diagram from the top to the bottom. As we mentioned above, each use case will have a number of alternate flows. Each Sequence diagram represents one of the flows through a use case.The objects that participate in the flow are shown in rectangles across the top of the diagram.

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Overview of Software Tools for Obtaining UML Class Diagrams and Sequence Diagrams from Source Code within TFM4MDA

Overview of Software Tools for Obtaining UML Class Diagrams and Sequence Diagrams from Source Code within TFM4MDA

Ignore frame 1 1 Consider frame 1 1 Both tools Visual Paradigm for UML and EclipseUML have all elements of the UML sequence diagram, excluding element “Unknown message”, as it is illustrated in Table 2. The UML sequence diagram cannot be created in the tool ArgoEclipse, because this function does not currently work correctly in it. This is the reason why no one element is included in Table 2. The AmaterasUML has only some of the UML sequence diagram elements, shown in Table 2. Only two tools, namely Visual Paradigm for UML and EclipseUML, can show the behavior of the software system in detail. The ability to show the behavior of the software system in the AmaterasUML is limited, because it does not support any kind of the UML sequence diagram frames.
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DEVELOPMENT OF SALES MODELS BY UML DIAGRAMS

DEVELOPMENT OF SALES MODELS BY UML DIAGRAMS

Sequence diagrams are a kind of an interaction diagram that emphasize the time ordering of messages. A message is a specification of a communication between objects that conveys information with the expectation that activity will ensue[9]. The diagram that displayed in Fig. 6 illustrates the sequence implementation of deposit process. To illustrate the power of this technique, we show in Fig. 6 the sequence diagram describing interaction of the System Actor and its four types of classes (Orders, Invoice, Stock and Depository) in the realization of this use case.
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Conallen UML Diagrams For Dynamic Analysis of WAs

Conallen UML Diagrams For Dynamic Analysis of WAs

Figure 5 shows one of the many possible views of the class diagram. In particular, stereotypes are used to dis- tinguish server pages, HTML pages, web services (repre- sented as triangles), files and databases (represented as cir- cles). Similarly to the deployment diagram, tagged values indicate, as frequencies, the type of operations performed on files and databases, the methods invoked on the web ser- vice, and the way a page passed information or the control to another (i.e. link or submit). A second type of visual- ization is shown in Figure 6. Along with the stereotype of the association (e.g., DB Connect), the diagram shows, as tagged values, the list of the variables passed between two pages, thus giving an immediate representation of data-flow information.
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Sequence Diagrams. Massimo Felici. Massimo Felici Sequence Diagrams c

Sequence Diagrams. Massimo Felici. Massimo Felici Sequence Diagrams c

Asynchronous: With an asynchronous flow of control, there is no explicit return message to the caller. An asynchronous message between objects indicates no-wait semantics; the sender does not wait for the message before it continues. This allows objects to execute concurrently.

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INTEGRATING UML 2.0 ACTIVITY DIAGRAMS AND PI-

INTEGRATING UML 2.0 ACTIVITY DIAGRAMS AND PI-

Activity diagram is an important UML diagram to describe dynamic aspects of a system. Activity diagram is the object-oriented equivalent of flow charts and Data Flow Diagrams (DFDs) from structured software development. It is used to represent the flow from one activity to another activity. The activity describes a particular operation of the system. So, the control flow is drawn from one operation to another. This flow can be sequential, branched or concurrent. Activity diagrams allow dealing with all types of flow control by means of different elements, like initial, flow final, activity final, decision, merge, fork and join nodes. For more details, the reader is referred to [3].
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Identification and Check of Inconsistencies between UML Diagrams

Identification and Check of Inconsistencies between UML Diagrams

2.2. Consistency rules between Sequence Diagrams and Communication Diagrams Communication Diagrams show interactions through an architectural view where the arc between the communi- cating Lifelines are decorated with description of the passed Messages and their sequencing. Sequence Dia- grams and Communication Diagrams are kinds of vari- ants of Interaction Diagram. Communication Diagrams correspond to simple Sequence Diagrams that use none of the structuring mechanisms such as Interaction Uses and Combined Fragments. They are on a par with each other, and can be transformed from one variant to anther one. So the consistency rules related to Sequence Dia- grams mentioned above apply to Communication Dia- grams. It is needless to discuses the consistency rules
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A Comparison of BPMN and UML 2.0 Activity Diagrams

A Comparison of BPMN and UML 2.0 Activity Diagrams

Russell examines the suitability of UML 2.0 Activity Diagrams for business process modeling, using Workflow Patterns [Russell et al., 2006b] as an evaluation framework. The pattern evaluation shows that UML 2.0 Activity Diagrams is not suitable for representing all aspects of this type of modeling. It offers support for control-flow and data perspective allowing most of the constructs to be directly captured. However, it is extremely limited in modeling resource-related or organizational aspects of business process. These limitations are shared with most of the other BPMLs, showing the emphasis that has been placed on the control-flow and data perspectives in these notations.
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Types of UML Diagram. UML Diagrams OOAD. Computer Engineering Sem -IV

Types of UML Diagram. UML Diagrams OOAD. Computer Engineering Sem -IV

Introduction - Sequence diagrams model the dynamic aspects of a software system. - The emphasis is on the “sequence” of messages rather than relationship between objects. - A sequence diagram maps the flow of logic or flow of control within a usage scenario into a visual diagram enabling the software architect to both document and validate the logic during the analysis and design stages.

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Detecting and resolving semantic pathologies in UML sequence diagrams

Detecting and resolving semantic pathologies in UML sequence diagrams

the semantics of the target platform. Hence, the classifica- tion of defects has to be adapted for the particular semantics that are expected in practise. The profile gives the user a simple mechanism for rigorously incorporating the appro- priate semantics into their requirements model. It is also possible to use this profile to infer resolutions for certain types of pathology. In some cases it is possible to auto- matically correct semantically inconsistent requirements by imposing constraints derived from the UML profile. Or to provide the practitioner with a range of solutions depending on which aspects of the profile they wish to adopt. We give an example from an industrial case study in Section 4.4 that illustrates how the UML profile can be used in this way. Fi- nally, we describe some initial evaluations of Mint, where it has been applied to real scenarios.
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UML DIAGRAMS-BANK MANAGEMENT

UML DIAGRAMS-BANK MANAGEMENT

2. Bank Database validates the user. 3. On success user can transfer money, change his password and view his profile. 1.3 Alternate Flow If in the basic flow, the details specified by user are invalid then he is informed that his login is failed .Then the user may quit the system or he may create a new account.

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Design and UML Class Diagrams

Design and UML Class Diagrams

• collaborators : other classes that are sent messages by this class (asymmetric).. • UML diagrams3[r]

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Semantics of UML class diagrams

Semantics of UML class diagrams

For compositions, there is a condition on evolution of snapshots: if an object of the composite class is deleted, so must be all associated elements of component classes. Definition (tra[r]

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OO Design: UML Diagrams

OO Design: UML Diagrams

two seats to watch Che Part Two tonight. The cinema employee starts using the booking system to find and reserve a seat.. 2) A customer requests five seats together. Work out exactly h[r]

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A Novel Test Case Design Technique Using Dynamic Slicing of UML Sequence Diagrams

A Novel Test Case Design Technique Using Dynamic Slicing of UML Sequence Diagrams

These works [28, 19, 31, 17, 25] discussed above have focused on unit testing of procedural programs. 7 Conclusion We have presented a novel method to generate test cases by dynamic slicing UML sequence diagrams. Our approach is meant for cluster level testing where object interactions are tested. Our approach automatically generates test data, which can be used by a tool to carry out automatic testing of a program. Generation of MDG is the only static part in our approach. We identify the conditional predicates associated with messages in a sequence diagram and create dynamic slice with respect to each conditional predicate. We generate test data with respect to each constructed slice and the test data is generated satisfying slice condition. We have formulated a test adequacy criterion named slice coverage crite- rion. We have implemented our methodology to develop a prototype tool which was found effective in generating test cases. The test cases generated can also be used for confor- mance testing of the actual software where the implementation is tested to check whether it conforms to the design. The slicing approach was found to be especially advantageous when the number of messages in the sequence diagram is large. We need to consider only the slices for finding test cases instead of having to look at the whole sequence diagram.
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Recommender systems for UML class diagrams.

Recommender systems for UML class diagrams.

Resumo Modelos UML são usados de várias formas na engenharia de software. Eles podem mo- delar desde requisitos até todo o software, e compreendem vários diagramas. O diagrama de classes, o mais popular dentre os diagramas da UML, faz uso de vários elementos UML e adornos, tais como abstração, interfaces, atributos derivados, conjuntos de generalização, composições e agregações. Atualmente, não há maneira fácil de encontrar este tipo de di- agrama com base nestas características para a reutilização ou a aprendizagem por tarefas de exemplo. Por outro lado, Sistemas de Recomendação são ferramentas e técnicas que são capazes de descobrir os elementos mais adequados para um usuário, dentre muitos ou- tros. Existem várias técnicas de recomendação, que usam informações dos elementos de várias maneiras, ao uso da opinião de outros usuários. Sistemas de recomendação já foram utilizadas com sucesso em vários problemas da engenharia de software, a exemplo da reco- mendação de partes de código para reuso (como métodos, por exemplo) e da identificação do desenvolvedor mais adequado para trabalhar em certas áreas do software. Este trabalho tem como objetivo propor e avaliar (i) uma representação baseada em conteúdo para diagramas de classe e as preferências do usuário, (ii) um novo algoritmo de recomendação baseado no conhecimento, (iii) a aplicação deste algoritmo e outros dois outros do estadodaarte para a recomendação de diagramas de classe UML e (iv) uma avaliação destas abordagens contra uma sugestão aleatória. Para atingir este objetivo, foi realizado um estudo de caso com es- tudantes de ciência da computação e egressos. Depois de comparar os algoritmos, os nossos resultados mostram que, para o nosso conjunto de dados, todos eles são melhores do que uma recomendação aleatória.
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Graph Layout Aesthetics in UML Diagrams:

Graph Layout Aesthetics in UML Diagrams:

referred to them : “having two labels on the association lones only complicates it. It’s obvious how the relationships work”; “Less complex.” 3.2 Discussion: UML class diagrams By analysing the subjects’ stated reasons for their preferences, the only class diagram aesthetic result that appeared to be affected by confounding factors was horizontal labels, where many subjects who preferred the horizontal labels drawing referred to direction of information flow. Both the crosses and bends aesthetic results were unaffected by other factors, while those subjects who did not like the orthogonal diagram did so because of the increased number of bends. Most of those subjects who preferred independent inheritance arcs, a wider diagram, variation in font, or no directional indicators did so merely because of personal preference, rather than because there were other factors that affected their choice.
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