iluwatar · iluwatar · Nov 27, 2016 · Nov 6, 2016 · Nov 12, 2016 · Nov 13, 2016
diff --git a/hexagonal/README.md b/hexagonal/README.md
@@ -23,15 +23,18 @@ Allow an application to equally be driven by users, programs, automated test or
 ## Applicability
 Use Hexagonal Architecture pattern when
 
-* it is important that the application is fully testable
-* you use Domain Driven Design methodology and/or Microservices architectural style
+* When the application needs to be independent of any frameworks
+* When it is important that the application highly maintainable and fully testable
 
 ## Tutorials
 * [Build Maintainable Systems With Hexagonal Architecture](http://java-design-patterns.com/blog/build-maintainable-systems-with-hexagonal-architecture/)
 
+## Presentations
+* [Hexagonal Architecture](https://github.com/iluwatar/java-design-patterns/tree/master/hexagonal/etc/presentation.html)
+
 ## Real world examples
 
-* [Apache Isis](https://isis.apache.org/)
+* [Apache Isis](https://isis.apache.org/) builds generic UI and REST API directly from the underlying domain objects
 
 ## Credits
 

diff --git a/hexagonal/etc/layers.png b/hexagonal/etc/layers.png
diff --git a/hexagonal/etc/ports_and_adapters.png b/hexagonal/etc/ports_and_adapters.png
diff --git a/hexagonal/etc/ports_and_adapters.xml b/hexagonal/etc/ports_and_adapters.xml
@@ -0,0 +1 @@
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diff --git a/hexagonal/etc/presentation.html b/hexagonal/etc/presentation.html
@@ -0,0 +1,103 @@
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Title</title>
+    <meta charset="utf-8">
+    <style>
+      @import url(https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz);
+      @import url(https://fonts.googleapis.com/css?family=Droid+Serif:400,700,400italic);
+      @import url(https://fonts.googleapis.com/css?family=Ubuntu+Mono:400,700,400italic);
+
+      body { font-family: 'Droid Serif'; }
+      h1, h2, h3 {
+        font-family: 'Yanone Kaffeesatz';
+        font-weight: normal;
+      }
+      .remark-code, .remark-inline-code { font-family: 'Ubuntu Mono'; }
+    </style>
+  </head>
+  <body>
+    <textarea id="source">
+
+class: center, middle
+
+# Hexagonal Architecture
+
+---
+
+# Also known as
+
+* Ports and Adapters
+* Clean Architecture
+* Onion Architecture
+
+---
+
+# Layered architecture problems
+
+* No clear application core
+* Business logic leaks to the presentation layer
+<br />  
+<br />  
+
+.center[![Alt text](layers.png)]
+
+---
+
+# Intent
+
+* Application can be driven by users, programs, automated test or batch scripts
+* Application can be developed and tested in isolation from its eventual run-time devices and databases
+
+---
+
+# Applicability
+
+Use Hexagonal Architecture pattern
+
+* When the application needs to be independent of any frameworks
+* When it is important that the application highly maintainable and fully testable
+
+---
+
+# Concepts
+
+* Ports are interfaces
+* The ports that drive the application are called primary ports
+* The ports that are driven by the application are called secondary ports
+
+---
+
+# Concepts
+
+* Adapters are interface implementations
+* Typically different adapters for testing and production are provided
+
+---
+
+# Diagram
+
+.center[![Alt text](ports_and_adapters.png)]
+
+---
+
+# Real world examples
+
+* [Apache Isis](https://isis.apache.org/) builds generic UI and REST API directly from the underlying domain objects
+
+---
+
+# Tutorials
+
+* Blog http://java-design-patterns.com/blog/build-maintainable-systems-with-hexagonal-architecture/
+* Source code http://java-design-patterns.com/patterns/hexagonal/
+
+    </textarea>
+    <script src="https://gnab.github.io/remark/downloads/remark-latest.min.js">
+    </script>
+    <script>
+      var slideshow = remark.create();
+    </script>
+  </body>
+</html>
+
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