{"id":3417,"date":"2022-02-09T12:17:45","date_gmt":"2022-02-09T04:17:45","guid":{"rendered":"https:\/\/blog.visual-paradigm.com\/vn\/?p=3417"},"modified":"2022-11-24T17:53:44","modified_gmt":"2022-11-24T09:53:44","slug":"what-is-multiplicity","status":"publish","type":"post","link":"https:\/\/blog.visual-paradigm.com\/vn\/what-is-multiplicity\/","title":{"rendered":"T\u00ednh \u0110a D\u1ea1ng L\u00e0 G\u00ec"},"content":{"rendered":"<p><span class=\"\">T\u00ednh \u0111a d\u1ea1ng trong\u00a0<\/span><a href=\"https:\/\/www.visual-paradigm.com\/guide\/uml-unified-modeling-language\/what-is-class-diagram\/\"><span class=\"\">bi\u1ec3u \u0111\u1ed3 l\u1edbp<\/span><\/a><span class=\"\">\u00a0n\u00ean \u0111\u01b0\u1ee3c ch\u1ec9 ra \u1edf m\u1ed7i ph\u1ea7n cu\u1ed1i c\u1ee7a li\u00ean k\u1ebft.\u00a0<\/span>\u0110i\u1ec1u n\u00e0y ch\u1ec9 \u0111\u1ecbnh s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 t\u1ed1i thi\u1ec3u v\u00e0 t\u1ed1i \u0111a c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c li\u00ean k\u1ebft.<\/p>\n<p>V\u00ed d\u1ee5, m\u1ed9t chi\u1ebfc \u00f4 t\u00f4 c\u00f3 3 ho\u1eb7c 4 b\u00e1nh, nh\u01b0ng m\u1ed7i b\u00e1nh thu\u1ed9c v\u1ec1 m\u1ed9t chi\u1ebfc \u00f4 t\u00f4.\u00a0\u0110\u1eb7t nhi\u1ec1u k\u00fd hi\u1ec7u g\u1ea7n cu\u1ed1i c\u1ee7a m\u1ed9t li\u00ean k\u1ebft.\u00a0C\u00e1c k\u00fd hi\u1ec7u n\u00e0y cho bi\u1ebft s\u1ed1 l\u01b0\u1ee3ng c\u00e1 th\u1ec3 c\u1ee7a m\u1ed9t l\u1edbp \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi m\u1ed9t th\u1ec3 hi\u1ec7n c\u1ee7a l\u1edbp kia.<\/p>\n<p>V\u00ed d\u1ee5, m\u1ed9t c\u00f4ng ty s\u1ebd c\u00f3 m\u1ed9t ho\u1eb7c nhi\u1ec1u nh\u00e2n vi\u00ean, nh\u01b0ng m\u1ed7i nh\u00e2n vi\u00ean ch\u1ec9 l\u00e0m vi\u1ec7c cho m\u1ed9t c\u00f4ng ty.<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/05-multiplicities-examples.png\" alt=\"\u591a\u91cd\u6027\u793a\u4f8b\" \/><\/p>\n<ul>\n<li>C\u00e1c gi\u00e1 tr\u1ecb nh\u1ecf nh\u1ea5t v\u00e0 l\u1edbn nh\u1ea5t \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng hai d\u1ea5u ch\u1ea5m.<\/li>\n<li>D\u1ea5u hoa th\u1ecb (*) th\u1ec3 hi\u1ec7n gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t kh\u00f4ng x\u00e1c \u0111\u1ecbnh.<\/li>\n<li>Trong tr\u01b0\u1eddng h\u1ee3p gi\u00e1 tr\u1ecb t\u1ed1i thi\u1ec3u v\u00e0 gi\u00e1 tr\u1ecb l\u1edbn nh\u1ea5t gi\u1ed1ng nhau, s\u1ed1 ch\u1ec9 \u0111\u01b0\u1ee3c hi\u1ec3n th\u1ecb m\u1ed9t l\u1ea7n.<\/li>\n<li>Ngo\u00e0i ra, s\u1ed1 0 ho\u1eb7c nhi\u1ec1u h\u01a1n (0\u2026 *) c\u0169ng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 d\u1ea5u hoa th\u1ecb \u0111\u01a1n gi\u1ea3n (*) v\u00ec n\u00f3 ph\u1ed5 bi\u1ebfn.<\/li>\n<\/ul>\n<p>Cu\u1ed1i c\u00f9ng, c\u00e1c ph\u1ea1m vi v\u00e0 \/ ho\u1eb7c c\u00e1c gi\u00e1 tr\u1ecb ri\u00eang l\u1ebb c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ph\u00e2n t\u00e1ch b\u1eb1ng d\u1ea5u ph\u1ea9y \u0111\u1ec3 li\u1ec7t k\u00ea c\u00e1c gi\u00e1 tr\u1ecb thay th\u1ebf, t\u1ee9c l\u00e0 1..3, 5..8<\/p>\n<p>&nbsp;<\/p>\n<p>V\u00ed d\u1ee5 v\u1ec1 S\u01a1 \u0111\u1ed3 l\u1edbp<\/p>\n<p><img decoding=\"async\" src=\"https:\/\/blog.visual-paradigm.com\/wp-content\/uploads\/2022\/10\/company-structure.png\" \/><\/p>\n<p><a class=\"edit-template-v1\" href=\"https:\/\/online.visual-paradigm.com\/app\/diagrams\/#diagram:proj=0&amp;type=ClassDiagram&amp;gallery=\/repository\/e952006a-41a9-4866-83dd-8dad5219dc15.xml&amp;name=Company%20Structure\">CH\u1ec8NH S\u1eecA S\u01a0 \u0110\u1ed2 L\u1edaP TR\u1ef0C TUY\u1ebeN<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Multiplicity in class diagram should be indicated at each end of the association. This specifies the minimum and maximum number of instances that can be linked.<br \/>\nFor example, a car has 3 or 4 wheels, but each wheel belongs to exactly one car. Place multiplicity notations near the ends of an association. These symbols indicate the number of instances of one class linked to one instance of the other class.<\/p>\n","protected":false},"author":1,"featured_media":3495,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_lmt_disableupdate":"","_lmt_disable":"","footnotes":""},"categories":[36],"tags":[],"class_list":["post-3417","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-uml","loop-entry","clr"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.3 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>T\u00ednh \u0110a D\u1ea1ng L\u00e0 G\u00ec<\/title>\n<meta name=\"description\" content=\"Multiplicity in class diagram should be indicated at each end of the association. This specifies the minimum and maximum number of instances that can be linked. For example, a car has 3 or 4 wheels, but each wheel belongs to exactly one car. Place multiplicity notations near the ends of an association. These symbols indicate the number of instances of one class linked to one instance of the other class.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/blog.visual-paradigm.com\/vn\/what-is-multiplicity\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"T\u00ednh \u0110a D\u1ea1ng L\u00e0 G\u00ec\" \/>\n<meta property=\"og:description\" content=\"Multiplicity in class diagram should be indicated at each end of the association. This specifies the minimum and maximum number of instances that can be linked. For example, a car has 3 or 4 wheels, but each wheel belongs to exactly one car. Place multiplicity notations near the ends of an association. 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