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copied!<blockquote> <p>1) What is the relationship between PolicyLayer and PolicyServiceInterface</p> </blockquote> <p>The -----> is <a href="http://publib.boulder.ibm.com/infocenter/rsmhelp/v7r0m0/index.jsp?topic=/com.ibm.xtools.modeler.doc/topics/cassnclss.html" rel="nofollow noreferrer"><code>Association</code></a> ("knows a") </p> <p><a href="http://www.sedris.org/drawings/uml_8.gif" rel="nofollow noreferrer">Association http://www.sedris.org/drawings/uml_8.gif</a></p> <p>C# code:</p> <pre><code>public interface PolicyServiceInterface { } public class PolicyLayer { private IPolicyServiceInterface _policyServiceInterface; // Constructor Assocation public PolicyLayer(IPolicyServiceInterface policyServiceInterface) { _policyServiceInterface = policyServiceInterface; } } </code></pre> <blockquote> <p>2) What is the relationship between PolicyServiceInterface and MachanismLayer.</p> </blockquote> <p>The - - -|> is <a href="http://publib.boulder.ibm.com/infocenter/rsmhelp/v7r0m0/index.jsp?topic=/com.ibm.xtools.modeler.doc/topics/creal.html" rel="nofollow noreferrer"><code>Realization</code></a> ("implements") </p> <p><img src="https://www.tutorialspoint.com/images/uml_realization.jpg" alt="Realization"></p> <p>C# Code:</p> <pre><code>public interface PolicyServiceInterface { } public class MachanismLayer : PolicyServiceInterface </code></pre> <blockquote> <p>3) Do the following have the same meaning: 1) A solid line with a triangle at one end 2) A dashed line with a triangle at one end?</p> </blockquote> <p>No they have different meanings:</p> <p>The -----|> is <a href="http://publib.boulder.ibm.com/infocenter/rsmhelp/v7r0m0/index.jsp?topic=/com.ibm.xtools.modeler.doc/topics/cgeneral.html" rel="nofollow noreferrer"><code>Generalization</code></a> ("inherits") </p> <p><img src="https://www.tutorialspoint.com/images/notation_generalization.jpg" alt="Generalization"></p> <p>C# Code:</p> <pre><code>public class PolicyServiceInterface { } // could also be abstract public class MachanismLayer : PolicyServiceInterface </code></pre> <blockquote> <p>What is the difference between: 1) A solid line with an arrow at one end 2) A dashed line with an arrow at one end</p> </blockquote> <p>The - - -> is <a href="http://publib.boulder.ibm.com/infocenter/rsmhelp/v7r0m0/index.jsp?topic=/com.ibm.xtools.modeler.doc/topics/cdepend.html" rel="nofollow noreferrer"><code>Dependency</code></a> ("uses a") There are various forms of dependency including local variables, parameter values, static function calls or return values. </p> <p><img src="https://www.tutorialspoint.com/images/notation_dependency.jpg" alt="Dependency"></p> <p>C# Code:</p> <pre><code>// Here Foo is dependent on Baz // That is Foo - - -> Baz public class Foo { public int DoSomething() { // A form of local variable dependency Baz x = new Baz(); return x.GetInt(); } } </code></pre> <p>See my answer <a href="https://stackoverflow.com/a/6231433/95573">here</a> for Composition and Aggregation.</p>

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