Essays academic service


What perspectives may be used for system modelling

Define the system Reference Documentation The SysML standard is used for modeling heterogeneous systems mechanic, electronic, software. The UML standard is used for modeling business processes and for analysing and designing software applications.

First, he defines its system by writing the different requirements and from that he describes the system structure. Then, he refines the structure by defining the internal structure of each part of the system. When he finishes, Alfred gives the system description to the software architects in order that they specified the application. For specifying the software parts, the UML standard is used by John to define a software application, by Bob to implement the application, by Kevin to document it and finally by Alice to get an overview of a build application.

Alfred uses SysML to describe its system. John also uses UML to describe its application. Modeling projects are responsible for storing the representation data diagrams, tables, etc. Modeling perspective UML Designer is integrated into Eclipse and provides the default views and editors generated by Sirius. The Modeling perspective provides all the required views, wizards and menus provided by UML Designer.

The Modeling perspective provides the following views by default: For diagrams, it shows a miniature view of the whole diagram on which the user can easily navigate to other parts of the diagram for large ones.

The Properties view gives detailed information about the currently selected element. The Problems view contains information markers of different severities information only, warnings, or errors. This is where the user will find validation errors on the models for example. Model Explorer The Model Explorer view shows all the projects in the workspace and the files they contain.

It adds some special capabilities to Modeling Projects, to allow the user to view and manipulate the semantic models and their graphical representations what perspectives may be used for system modelling inside the explorer: The Model Explorer supports the Link with Editor feature, which can be enabled by pressing the icon in the top right corner of the view the one with two horizontal arrows.

When this what perspectives may be used for system modelling is enabled, if the user has a representation opened, clicking anywhere on it will automatically select the corresponding representation inside the Model Explorer expanding the project and files if necessary.

Conversely, if he selects a semantic element from one of the semantic models in the Model Explorer view and if this element is represented somewhere on the opened editor, it will be automatically selected. The Model Explorer also supports filtering of elements: Diagram editor When a diagram is opened by the user, it opens in the diagram editor.

This editor is divided in three areas: Palette All diagrams have a palette of tools, which by default is docked on the right hand side of the main graphical area. The top row of the palette contains some general tools which are available on all diagrams, while the rest contains tools specific to each graphical modeler.

By default, the palette appears with a pre-defined size on the right hand side of the diagram. These actions are available on the palette: The user can resize it to take more or less horizontal space by dragging the vertical separator between the palette and the diagram with his mouse. The user can also fold the palette to hide it almost completely by clicking on the triangular icon in the corner of the palette header.

When folded, he can restore it by clicking again on the same triangular icon. He can also keep it folded except when needed: It will automatically hide again if he selects a tool or clicks elsewhere.

A few general tools are available in standard on all diagrams.

Introducing Enterprise Architect 14 – Model Patterns & Perspectives

They appear in the top row of the palette, just below the header: The selection tool is the default one initially selected when a diagram is opened. To select an element on a diagram while this tool is active, simply click on it. To select several elements at the same time, the user can either draw a rectangle on the diagram all the elements completely contained in the rectangle will get selectedor click on each element individually while keeping the Ctrl key pressed.

When selecting elements which are already selected using what perspectives may be used for system modelling method, by clicking on them or drawing a rectangle around them, they are removed from the selection. Selected elements have an outline and anchors drawn on their border. Note that when a selection contains multiple elements, exactly one of them has black selection anchors; the rest have white anchors. The element with the black anchors is called the primary selection, and some tools treat it differently than the others for example alignment tools.

Next in the palette come two buttons to control the zoom level of the main diagram area. When the Zoom in resp.

Zoom out button is active, clicking anywhere on the diagram will increment resp. The current zoom level is visible in the tabbar when no diagram element is selected see the section on the tabbar buttons for more ways to control the zoom level. Notes and note attachments: All diagrams support the creation of notes and text elements, which can be attached to diagram elements.

These elements are purely graphical annotations, and have no effect on the semantic model. By default, the Note tool represented by a yellow sticky note is selected. If the user clicks on the small arrow next to the sticky note, a menu appears where he can select which of the three tools to enable: Note, Text or Note attachment. Notes and Text elements: Are created in a similar way: The only difference between notes and text zones is the visual presentation; notes have a yellow background by default and a border which represents a sticky not with a folded top-right corner.

Can be created to link either notes or text zone to diagram elements including other notes and text attachments. To create an attachment, activate the tool and then click once on the source element and once on the target element. The user can also click and drag from the source to the target elements. The final standard tools which are available in the top row of all the palette allow to mark or unmark diagram elements as pinned.

Pinning an element on the diagram means that when an automatic layout of the diagram is requested see the Arrange All actionthe element will not be moved or resized: Pinned element can still be moved manually. To pin or unpin an element, simply select the appropriate tool using the arrow right next to the icon to make the menu appearand when what perspectives may be used for system modelling tool is active, click on the element to mark as pinned or un-pinned.

Editor tab-bar The editor is composed by a tab-bar and a main graphical area. The tab-bar provides the following tools: Selection tools The tab-bar contains tools to select groups of diagram elements in a single operation: This is the default operation and will select all the elements visible on the diagram.

This action will select all connectors aka edges between diagram elements which are visible on the diagram, and only them. When in manual refresh mode i.

Automatic Refresh is uncheckedthe user must manually use the Refresh operation whenever he wants the diagram to take into account changes in the model. Even in automatic refresh mode, it may be sometimes necessary to invoke an explicit, manual refresh using this operation if UML Designer got confused.

Layouting diagrams Layouting mode: It avoids unfortunately changing properties or links related to model elements present on the diagram. Automatic layout uses a generic algorithm which tries to arrange the position and sizes of the elements on the diagram in a nice, readable way. In particular it makes sure, unless specific constraints prevent it, that no elements overlap each other, and what perspectives may be used for system modelling elements which contain others i.

It also tries to minimize the crossing of edges. This menu contains several operations Auto size, Make height and width same size… which can be used to align several graphical elements in various ways. The actions in this menu are only enabled when several elements are selected. It is possible to mark specific elements in a diagram as having a fixed location so that they are not moved by the Arrange All action. Diagram element pinning allows the user to combine both methods: It is possible to duplicate layout of diagram elements, that is to say to replicate mutual organization of diagram elements from one diagram to another.

This replication only applies to the same semantic elements between diagrams. Style customizations The style of each diagram elements can be customized. The user can customize: The preferences on this page are only taken into account as starting values for new diagrams. This button opens a dialog to manage the shown and hidden elements on the diagram with a tree view, using various selection buttons Check all, Uncheck all, Expand All and Collapse all and various filters All element, only checked elements and only unchecked elements.

It is possible to: Hide element from diagram: Every graphical element on a diagram can be hidden explicitly. To do that, simply right click on the graphical element or elements if the user wants to hide several elements at once that must be hidden. The graphical element is now hidden from view. Hide element from the outline: It is also possible to hide an element from the outline view. Choose outline mode to see the semantic model in a tree viewer. The user can now right click on an element and choose Hide element.

There are two ways to reveal hidden elements: On the outline view, in outline mode, he can see every model element. The elements that are hidden have their names displayed in italic style.

To reveal one of this element, simply right click on it and choose Show element. It is possible to call this menu directly on the label or on its graphical element.