{"id":5438,"date":"2022-05-20T02:02:05","date_gmt":"2022-05-20T02:02:05","guid":{"rendered":"https:\/\/www.booksofall.com\/pl\/?post_type=product&#038;p=5438"},"modified":"2022-06-15T05:20:15","modified_gmt":"2022-06-15T05:20:15","slug":"activity-diagrams","status":"publish","type":"product","link":"https:\/\/www.booksofall.com\/pl\/activity-diagrams\/","title":{"rendered":"Activity Diagrams"},"content":{"rendered":"<p><b>Activity diagrams<\/b>\u00a0are graphical representations of\u00a0<a title=\"Workflow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Workflow\">workflows<\/a>\u00a0of stepwise activities and actions with support for choice, iteration and concurrency. In the\u00a0<a title=\"Unified Modeling Language\" href=\"https:\/\/en.wikipedia.org\/wiki\/Unified_Modeling_Language\">Unified Modeling Language<\/a>, activity diagrams are intended to model both computational and organizational processes (i.e., workflows), as well as the data flows intersecting with the related activities. Although activity diagrams primarily show the overall flow of control, they can also include elements showing the flow of data between activities through one or more data stores.<\/p>\n<h2><span id=\"Construction\" class=\"mw-headline\">Construction<\/span><\/h2>\n<p>Activity diagrams are constructed from a limited number of shapes, connected with arrows. The most important shape types:<\/p>\n<ul>\n<li><i>ellipses<\/i>\u00a0represent\u00a0<i>actions<\/i>;<\/li>\n<li><i>diamonds<\/i>\u00a0represent\u00a0<i>decisions<\/i>;<\/li>\n<li><i>bars<\/i>\u00a0represent the start (<i>split<\/i>) or end (<i>join<\/i>) of concurrent activities;<\/li>\n<li>a\u00a0<i>black circle<\/i>\u00a0represents the start (<i>initial node<\/i>) of the workflow;<\/li>\n<li>an\u00a0<i>encircled black circle<\/i>\u00a0represents the end (<i>final node<\/i>).<\/li>\n<\/ul>\n<p>Arrows run from the start towards the end and represent the order in which activities happen.<\/p>\n<p>Activity diagrams can be regarded as a form of a structured\u00a0<a title=\"Flowchart\" href=\"https:\/\/en.wikipedia.org\/wiki\/Flowchart\">flowchart<\/a>\u00a0combined with a traditional data flow diagram. Typical flowchart techniques lack constructs for expressing concurrency. However, the join and split symbols in activity diagrams only resolve this for simple cases; the meaning of the model is not clear when they are arbitrarily combined with decisions or loops.<\/p>\n<p>While in UML 1.x, activity diagrams were a specialized form of state diagrams, in UML 2.x, the activity diagrams were reformalized to be based on\u00a0<a title=\"Petri net\" href=\"https:\/\/en.wikipedia.org\/wiki\/Petri_net\">Petri net<\/a>-like semantics, increasing the scope of situations that can be modeled using activity diagrams. These changes cause many UML 1.x activity diagrams to be interpreted differently in UML 2.x.<\/p>\n<p>UML activity diagrams in version 2.x can be used in various domains, e.g. in design of embedded systems. It is possible to verify such a specification using model checking technique.<\/p>\n<p>Activity Diagram<br \/>\n\u00bb Enfasi sui passi necessari a realizzare un caso d&#8217;uso o una operazione del sistema<\/p>\n<p><b>Activity diagrams<\/b>\u00a0are graphical representations of\u00a0<a title=\"Workflow\" href=\"https:\/\/en.wikipedia.org\/wiki\/Workflow\">workflows<\/a>\u00a0of stepwise activities and actions with support for choice, iteration and concurrency. In the\u00a0<a title=\"Unified Modeling Language\" href=\"https:\/\/en.wikipedia.org\/wiki\/Unified_Modeling_Language\">Unified Modeling Language<\/a>, activity diagrams are intended to model both computational and organizational processes (i.e., workflows), as well as the data flows intersecting with the related activities. Although activity diagrams primarily show the overall flow of control, they can also include elements showing the flow of data between activities through one or more data stores.<\/p>\n<p>Sequence Diagram<br \/>\n\u00bb Enfasi sulla sequenza delle interazioni tra attore e sistema, e tra le diverse parti del sistema<\/p>\n<p>A\u00a0<b>sequence diagram<\/b>\u00a0or\u00a0<b>system sequence diagram<\/b>\u00a0(SSD) shows\u00a0<a title=\"Process (computing)\" href=\"https:\/\/en.wikipedia.org\/wiki\/Process_(computing)\">process<\/a>\u00a0interactions arranged in time sequence in the field of\u00a0<a title=\"Software engineering\" href=\"https:\/\/en.wikipedia.org\/wiki\/Software_engineering\">software engineering<\/a>. It depicts the processes involved and the sequence of messages exchanged between the processes needed to carry out the functionality. Sequence diagrams are typically associated with use case realizations in the\u00a0<a title=\"4+1 architectural view model\" href=\"https:\/\/en.wikipedia.org\/wiki\/4%2B1_architectural_view_model\">4+1 architectural view model<\/a>\u00a0of the system under development. Sequence diagrams are sometimes called\u00a0<b>event diagrams<\/b>\u00a0or\u00a0<b>event scenarios<\/b>.<\/p>\n<p>For a particular scenario of a\u00a0<a title=\"Use case\" href=\"https:\/\/en.wikipedia.org\/wiki\/Use_case\">use case<\/a>, the diagrams show the events that external actors generate, their order, and possible inter-system events. All\u00a0<a title=\"Software system\" href=\"https:\/\/en.wikipedia.org\/wiki\/Software_system\">systems<\/a>\u00a0are treated as a\u00a0<a title=\"Black box\" href=\"https:\/\/en.wikipedia.org\/wiki\/Black_box\">black box<\/a>; the diagram places emphasis on events that cross the system boundary from actors to systems. A system sequence diagram should be done for the main success scenario of the\u00a0<a title=\"Use case\" href=\"https:\/\/en.wikipedia.org\/wiki\/Use_case\">use case<\/a>, and frequent or complex alternative scenarios.<\/p>\n","protected":false},"excerpt":{"rendered":"<p><iframe style=\"width: 100%; height: 480px; border: none;\" src=\"https:\/\/online.visual-paradigm.com\/share\/book\/activity-diagrams-yjq4hlu3l?enforceShowPromotionBar=true\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"featured_media":5447,"template":"","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Activity diagrams can be regarded as a form of a structured\u00a0flowchart\u00a0combined with a traditional data flow diagram."},"product_brand":[],"product_cat":[213],"product_tag":[201],"class_list":{"0":"post-5438","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-computer-uml","7":"product_tag-lecture-notes","9":"first","10":"instock","11":"shipping-taxable","12":"product-type-simple"},"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.1.1 - 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