{"id":5702,"date":"2022-05-24T02:28:14","date_gmt":"2022-05-24T02:28:14","guid":{"rendered":"https:\/\/www.booksofall.com\/pl\/?post_type=product&#038;p=5702"},"modified":"2022-06-15T05:17:32","modified_gmt":"2022-06-15T05:17:32","slug":"package-diagrams","status":"publish","type":"product","link":"https:\/\/www.booksofall.com\/pl\/package-diagrams\/","title":{"rendered":"Package Diagrams"},"content":{"rendered":"<p>A\u00a0<b>package diagram<\/b>\u00a0in the\u00a0<a title=\"Unified Modeling Language\" href=\"https:\/\/en.wikipedia.org\/wiki\/Unified_Modeling_Language\">Unified Modeling Language<\/a>\u00a0depicts the\u00a0<a title=\"Dependency (UML)\" href=\"https:\/\/en.wikipedia.org\/wiki\/Dependency_(UML)\">dependencies<\/a>\u00a0between the\u00a0<a title=\"Package (UML)\" href=\"https:\/\/en.wikipedia.org\/wiki\/Package_(UML)\">packages<\/a>\u00a0that make up a model.<\/p>\n<p>In addition to the standard\u00a0<a title=\"Dependency (UML)\" href=\"https:\/\/en.wikipedia.org\/wiki\/Dependency_(UML)\">UML Dependency<\/a>\u00a0relationship, there are two special types of dependencies defined between packages:<\/p>\n<ul>\n<li>package import<\/li>\n<li>package merge<\/li>\n<\/ul>\n<h3>Rationale<\/h3>\n<p>\u2022 Provide a way to group related UML elements and to scope their names<\/p>\n<p>\u2022 Provide a way to visualize dependencies between parts of your system<\/p>\n<ul>\n<li>\u00a0Vulnerable to changes (in other packages)<\/li>\n<\/ul>\n<p>\u2022 Provide support for analysis<\/p>\n<p>\u2022 Determine compilation order<\/p>\n<p>\u2022 Package design needs to balance diverse needs<\/p>\n<ul>\n<li>Easier to build and test<\/li>\n<li>Better tracking and property transparency<\/li>\n<li>Working at a stable overview without the noise of low-level details<\/li>\n<li>Less conflict between distributed teams<\/li>\n<li>Easy refactoring and extension<\/li>\n<\/ul>\n<p>A\u00a0<i>package import<\/i> is &#8220;a relationship between an importing namespace and a package, indicating that the importing namespace adds the names of the members of the package to its own namespace.&#8221; By default, an unlabeled dependency between two packages is interpreted as a package import relationship. In this relationship, elements within the target package will be imported into the source package.<\/p>\n<p>A\u00a0<i>package merge<\/i> is &#8220;a directed relationship between two packages, that indicates that the contents of the two packages are to be combined. It is very similar to Generalisation in the sense that the source element conceptually adds the characteristics of the target element to its own characteristics resulting in an element that combines the characteristics of both&#8221; In this relationship, if an element exists within both the source package and the target package, then the source element&#8217;s definition will be expanded to include the target element&#8217;s definition.<\/p>\n<h4><span id=\"Elements\" class=\"mw-headline\">Elements<\/span><\/h4>\n<ol>\n<li>Package: a general purpose mechanism for organising model elements &amp; diagrams into groups. It provides an encapsulated namespace within which all the names must be unique. It is used to group semantically related elements. It is a namespace as well as an element that can be contained in other packages&#8217; namespaces.<\/li>\n<li>Class: a representation of an object that reflects its structure and behavior within the system. It is a template from which running instances are created. Classes usually describe the logical structure of the system.<\/li>\n<li>Interface: a specification of behavior. An implementation class must be written to support the behavior of an interface class.<\/li>\n<li>Object: an instance of a class. It is often used in analysis to represent an artifact or other item.<\/li>\n<li>Table: a stereotyped class.<\/li>\n<\/ol>\n<h4><span id=\"Usage\" class=\"mw-headline\">Usage<\/span><\/h4>\n<p>Package diagrams can use packages containing use cases to illustrate the functionality of a software system.<\/p>\n<p>Package diagrams can use packages that represent the different layers of a software system to illustrate the layered architecture of a software system. The dependencies between these packages can be adorned with labels \/ stereotypes to indicate the communication mechanism between the layers.<\/p>\n<h4><span id=\"When_to_use\" class=\"mw-headline\">When to use<\/span><\/h4>\n<ol>\n<li>It is used in large scale systems to picture dependencies between major elements in the system<\/li>\n<li>Package diagrams represent a compile time grouping mechanism.<\/li>\n<\/ol>\n","protected":false},"excerpt":{"rendered":"<p><iframe style=\"width: 100%; height: 480px; border: none;\" src=\"https:\/\/online.visual-paradigm.com\/share\/book\/package-diagrams-yph7te3e?enforceShowPromotionBar=true\" frameborder=\"0\" allowfullscreen=\"allowfullscreen\"><\/iframe><\/p>\n","protected":false},"featured_media":5708,"template":"","meta":{"_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"A\u00a0package diagram\u00a0in the\u00a0Unified Modeling Language\u00a0depicts the\u00a0dependencies\u00a0between the\u00a0packages\u00a0that make up a model."},"product_brand":[],"product_cat":[213],"product_tag":[201],"class_list":{"0":"post-5702","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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