{"id":5689,"date":"2022-05-24T01:56:05","date_gmt":"2022-05-24T01:56:05","guid":{"rendered":"https:\/\/www.booksofall.com\/?post_type=product&#038;p=5689"},"modified":"2022-06-15T05:17:44","modified_gmt":"2022-06-15T05:17:44","slug":"information-systems-concepts-activity-diagrams","status":"publish","type":"product","link":"https:\/\/www.booksofall.com\/fr\/information-systems-concepts-activity-diagrams\/","title":{"rendered":"Information Systems Concepts: 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<h3><span id=\"Construction\" class=\"mw-headline\">Construction<\/span><\/h3>\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 to 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<h4 id=\"firstHeading\" class=\"firstHeading mw-first-heading\">Unified Modeling Language<\/h4>\n<p>The\u00a0<b>Unified Modeling Language<\/b>\u00a0(<b>UML<\/b>) is a general-purpose, developmental,\u00a0<a title=\"Modeling language\" href=\"https:\/\/en.wikipedia.org\/wiki\/Modeling_language\">modeling language<\/a>\u00a0in the field of\u00a0<a title=\"Software engineering\" href=\"https:\/\/en.wikipedia.org\/wiki\/Software_engineering\">software engineering<\/a>\u00a0that is intended to provide a standard way to visualize the design of a system.<\/p>\n<p>The creation of UML was originally motivated by the desire to standardize the disparate notational systems and approaches to software design. It was developed at\u00a0<a title=\"Rational Software\" href=\"https:\/\/en.wikipedia.org\/wiki\/Rational_Software\">Rational Software<\/a>\u00a0in 1994\u20131995, with further development led by them through 1996.<\/p>\n<p>In 1997, UML was adopted as a standard by the\u00a0<a title=\"Object Management Group\" href=\"https:\/\/en.wikipedia.org\/wiki\/Object_Management_Group\">Object Management Group<\/a>\u00a0(OMG), and has been managed by this organization ever since. In 2005, UML was also published by the\u00a0<a title=\"International Organization for Standardization\" href=\"https:\/\/en.wikipedia.org\/wiki\/International_Organization_for_Standardization\">International Organization for Standardization<\/a>\u00a0(ISO) as an approved ISO standard. Since then the standard has been periodically revised to cover the latest revision of UML.\u00a0In software engineering, most practitioners do not use UML, but instead produce informal hand drawn diagrams; these diagrams, however, often include elements from UML.<\/p>\n<p id=\"NlhcZgj\">\n","protected":false},"excerpt":{"rendered":"<p><iframe style=\"width: 100%; height: 480px; border: none;\" src=\"https:\/\/online.visual-paradigm.com\/share\/book\/information-systems-concepts--activity-diagrams-ypfy3brlw?enforceShowPromotionBar=true\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"featured_media":5692,"template":"","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"Activity diagrams are graphical representations of workflows of stepwise activities and actions with support for choice, iteration and concurrency."},"product_brand":[],"product_cat":[213],"product_tag":[201],"class_list":{"0":"post-5689","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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