doc/articles/reflective-emf-tutorial/index.html - www.eclipse.org/epsilon - Git at Google



 <!doctype html>
 <html lang="en" class="no-js">
   <head>

       <meta charset="utf-8">
       <meta name="viewport" content="width=device-width,initial-scale=1">


       <link rel="shortcut icon" href="../../../assets/images/favicon.png">
       <meta name="generator" content="mkdocs-1.1.2, mkdocs-material-5.4.0">


         <title>Reflective EMF Tutorial - Epsilon</title>


       <link rel="stylesheet" href="../../../assets/stylesheets/main.fe0cca5b.min.css">

         <link rel="stylesheet" href="../../../assets/stylesheets/palette.a46bcfb3.min.css">


         <meta name="theme-color" content="">


         <link href="https://fonts.gstatic.com" rel="preconnect" crossorigin>
         <link rel="stylesheet" href="https://fonts.googleapis.com/css?family=Roboto:300,400,400i,700%7CRoboto+Mono&display=fallback">
         <style>body,input{font-family:"Roboto",-apple-system,BlinkMacSystemFont,Helvetica,Arial,sans-serif}code,kbd,pre{font-family:"Roboto Mono",SFMono-Regular,Consolas,Menlo,monospace}</style>


       <link rel="stylesheet" href="../../../assets/stylesheets/extra.css">

       <link rel="stylesheet" href="../../../assets/stylesheets/mermaid.css">

       <link rel="stylesheet" href="../../../assets/javascript/google-code-prettify/prettify.css">

       <link rel="stylesheet" href="https://unpkg.com/mermaid@8.5.1/dist/mermaid.css">


 <!-- FAVICON -->

 <link rel="apple-touch-icon" sizes="76x76" href="/assets/images/apple-touch-icon.png">
 <link rel="icon" type="image/png" sizes="32x32" href="/assets/images/favicon-32x32.png">
 <link rel="icon" type="image/png" sizes="16x16" href="/assets/images/favicon-16x16.png">
 <link rel="mask-icon" href="/safari-pinned-tab.svg" color="#5bbad5">
 <meta name="msapplication-TileColor" content="#da532c">
 <meta name="theme-color" content="#ffffff">
 <link rel="shortcut icon" href="/assets/images/favicon.ico">

   </head>


     <body dir="ltr" data-md-color-scheme="" data-md-color-primary="black" data-md-color-accent="orange">


     <input class="md-toggle" data-md-toggle="drawer" type="checkbox" id="__drawer" autocomplete="off">
     <input class="md-toggle" data-md-toggle="search" type="checkbox" id="__search" autocomplete="off">
     <label class="md-overlay" for="__drawer"></label>
     <div data-md-component="skip">


         <a href="#reflective-emf-tutorial" class="md-skip">
           Skip to content
         </a>

     </div>
     <div data-md-component="announce">

     </div>

       <header class="md-header" data-md-component="header">
   <nav class="md-header-nav md-grid" aria-label="Header">
     <a href="../../.." title="Epsilon" class="md-header-nav__button md-logo" aria-label="Epsilon">

   <img src="../../../assets/images/epsilon-white-background.png" alt="logo">

     </a>
     <label class="md-header-nav__button md-icon" for="__drawer">
       <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M3 6h18v2H3V6m0 5h18v2H3v-2m0 5h18v2H3v-2z"/></svg>
     </label>
     <div class="md-header-nav__title" data-md-component="header-title">

         <div class="md-header-nav__ellipsis">
           <span class="md-header-nav__topic md-ellipsis">
             Epsilon
           </span>
           <span class="md-header-nav__topic md-ellipsis">

               Reflective EMF Tutorial

           </span>
         </div>

     </div>

       <label class="md-header-nav__button md-icon" for="__search">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0116 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 019.5 16 6.5 6.5 0 013 9.5 6.5 6.5 0 019.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5z"/></svg>
       </label>

 <div class="md-search" data-md-component="search" role="dialog">
   <label class="md-search__overlay" for="__search"></label>
   <div class="md-search__inner" role="search">
     <form class="md-search__form" name="search">
       <input type="text" class="md-search__input" name="query" aria-label="Search" placeholder="Search" autocapitalize="off" autocorrect="off" autocomplete="off" spellcheck="false" data-md-component="search-query" data-md-state="active">
       <label class="md-search__icon md-icon" for="__search">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M9.5 3A6.5 6.5 0 0116 9.5c0 1.61-.59 3.09-1.56 4.23l.27.27h.79l5 5-1.5 1.5-5-5v-.79l-.27-.27A6.516 6.516 0 019.5 16 6.5 6.5 0 013 9.5 6.5 6.5 0 019.5 3m0 2C7 5 5 7 5 9.5S7 14 9.5 14 14 12 14 9.5 12 5 9.5 5z"/></svg>
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
       </label>
       <button type="reset" class="md-search__icon md-icon" aria-label="Clear" data-md-component="search-reset" tabindex="-1">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M19 6.41L17.59 5 12 10.59 6.41 5 5 6.41 10.59 12 5 17.59 6.41 19 12 13.41 17.59 19 19 17.59 13.41 12 19 6.41z"/></svg>
       </button>
     </form>
     <div class="md-search__output">
       <div class="md-search__scrollwrap" data-md-scrollfix>
         <div class="md-search-result" data-md-component="search-result">
           <div class="md-search-result__meta">
             Initializing search
           </div>
           <ol class="md-search-result__list"></ol>
         </div>
       </div>
     </div>
   </div>
 </div>


       <div class="md-header-nav__source">

 <a href="https://git.eclipse.org/c/epsilon/org.eclipse.epsilon.git/" title="Go to repository" class="md-source">
   <div class="md-source__icon md-icon">

     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M439.55 236.05L244 40.45a28.87 28.87 0 00-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 01-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 000 40.81l195.61 195.6a28.86 28.86 0 0040.8 0l194.69-194.69a28.86 28.86 0 000-40.81z"/></svg>
   </div>
   <div class="md-source__repository">
     Git repository @ Eclipse
   </div>
 </a>
       </div>

   </nav>
 </header>

     <div class="md-container" data-md-component="container">


       <main class="md-main" data-md-component="main">
         <div class="md-main__inner md-grid">


               <div class="md-sidebar md-sidebar--primary" data-md-component="navigation">
                 <div class="md-sidebar__scrollwrap">
                   <div class="md-sidebar__inner">
                     <nav class="md-nav md-nav--primary" aria-label="Navigation" data-md-level="0">
   <label class="md-nav__title" for="__drawer">
     <a href="../../.." title="Epsilon" class="md-nav__button md-logo" aria-label="Epsilon">

   <img src="../../../assets/images/epsilon-white-background.png" alt="logo">

     </a>
     Epsilon
   </label>

     <div class="md-nav__source">

 <a href="https://git.eclipse.org/c/epsilon/org.eclipse.epsilon.git/" title="Go to repository" class="md-source">
   <div class="md-source__icon md-icon">

     <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 448 512"><path d="M439.55 236.05L244 40.45a28.87 28.87 0 00-40.81 0l-40.66 40.63 51.52 51.52c27.06-9.14 52.68 16.77 43.39 43.68l49.66 49.66c34.23-11.8 61.18 31 35.47 56.69-26.49 26.49-70.21-2.87-56-37.34L240.22 199v121.85c25.3 12.54 22.26 41.85 9.08 55a34.34 34.34 0 01-48.55 0c-17.57-17.6-11.07-46.91 11.25-56v-123c-20.8-8.51-24.6-30.74-18.64-45L142.57 101 8.45 235.14a28.86 28.86 0 000 40.81l195.61 195.6a28.86 28.86 0 0040.8 0l194.69-194.69a28.86 28.86 0 000-40.81z"/></svg>
   </div>
   <div class="md-source__repository">
     Git repository @ Eclipse
   </div>
 </a>
     </div>

   <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../../.." title="Home" class="md-nav__link">
       Home
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../../download/" title="Download" class="md-nav__link">
       Download
     </a>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-nav__toggle md-toggle" data-md-toggle="nav-3" type="checkbox" id="nav-3">

     <label class="md-nav__link" for="nav-3">
       Documentation
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59 16.58L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.42z"/></svg>
       </span>
     </label>
     <nav class="md-nav" aria-label="Documentation" data-md-level="1">
       <label class="md-nav__title" for="nav-3">
         <span class="md-nav__icon md-icon">
           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
         </span>
         Documentation
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../../" title="Overview" class="md-nav__link">
       Overview
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../emc/" title="Model connectivity" class="md-nav__link">
       Model connectivity
     </a>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-nav__toggle md-toggle" data-md-toggle="nav-3-3" type="checkbox" id="nav-3-3">

     <label class="md-nav__link" for="nav-3-3">
       Languages
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59 16.58L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.42z"/></svg>
       </span>
     </label>
     <nav class="md-nav" aria-label="Languages" data-md-level="2">
       <label class="md-nav__title" for="nav-3-3">
         <span class="md-nav__icon md-icon">
           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
         </span>
         Languages
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../../eol/" title="Object language (EOL)" class="md-nav__link">
       Object language (EOL)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../egl/" title="Code generation (EGL)" class="md-nav__link">
       Code generation (EGL)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../evl/" title="Model validation (EVL)" class="md-nav__link">
       Model validation (EVL)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../etl/" title="Model transformation (ETL)" class="md-nav__link">
       Model transformation (ETL)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../ecl/" title="Model comparison (ECL)" class="md-nav__link">
       Model comparison (ECL)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../eml/" title="Model merging (EML)" class="md-nav__link">
       Model merging (EML)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../epl/" title="Pattern matching (EPL)" class="md-nav__link">
       Pattern matching (EPL)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../flock/" title="Model Migration (Flock)" class="md-nav__link">
       Model Migration (Flock)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../emg/" title="Model generation (EMG)" class="md-nav__link">
       Model generation (EMG)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../eunit/" title="Unit testing (EUnit)" class="md-nav__link">
       Unit testing (EUnit)
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../pinset/" title="Dataset extraction (Pinset)" class="md-nav__link">
       Dataset extraction (Pinset)
     </a>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-nav__toggle md-toggle" data-md-toggle="nav-3-4" type="checkbox" id="nav-3-4">

     <label class="md-nav__link" for="nav-3-4">
       Tools
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59 16.58L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.42z"/></svg>
       </span>
     </label>
     <nav class="md-nav" aria-label="Tools" data-md-level="2">
       <label class="md-nav__title" for="nav-3-4">
         <span class="md-nav__icon md-icon">
           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
         </span>
         Tools
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../../picto/" title="Picto" class="md-nav__link">
       Picto
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../flexmi/" title="Flexmi" class="md-nav__link">
       Flexmi
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../eugenia/" title="Eugenia" class="md-nav__link">
       Eugenia
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../exeed/" title="Exeed" class="md-nav__link">
       Exeed
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../modelink/" title="Modelink" class="md-nav__link">
       Modelink
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../hutn/" title="HUTN" class="md-nav__link">
       HUTN
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../workflow/" title="Workflow (Ant tasks)" class="md-nav__link">
       Workflow (Ant tasks)
     </a>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item">
     <a href="../" title="Articles" class="md-nav__link">
       Articles
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../../examples/" title="Examples" class="md-nav__link">
       Examples
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://www.youtube.com/epsilondevs" title="Screencasts" class="md-nav__link">
       Screencasts
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://www.youtube.com/playlist?list=PLRwHao6Ue0YUecg7vEUQTrtySIWwrd_mI" title="Lectures" class="md-nav__link">
       Lectures
     </a>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-nav__toggle md-toggle" data-md-toggle="nav-3-9" type="checkbox" id="nav-3-9">

     <label class="md-nav__link" for="nav-3-9">
       Javadoc
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59 16.58L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.42z"/></svg>
       </span>
     </label>
     <nav class="md-nav" aria-label="Javadoc" data-md-level="2">
       <label class="md-nav__title" for="nav-3-9">
         <span class="md-nav__icon md-icon">
           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
         </span>
         Javadoc
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="https://download.eclipse.org/epsilon/2.2/javadoc/" title="Stable" class="md-nav__link">
       Stable
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://download.eclipse.org/epsilon/interim-javadoc/" title="Interim" class="md-nav__link">
       Interim
     </a>
   </li>


       </ul>
     </nav>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-nav__toggle md-toggle" data-md-toggle="nav-4" type="checkbox" id="nav-4">

     <label class="md-nav__link" for="nav-4">
       Issues
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59 16.58L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.42z"/></svg>
       </span>
     </label>
     <nav class="md-nav" aria-label="Issues" data-md-level="1">
       <label class="md-nav__title" for="nav-4">
         <span class="md-nav__icon md-icon">
           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
         </span>
         Issues
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="https://bugs.eclipse.org/bugs/enter_bug.cgi?product=epsilon" title="Report a new issue" class="md-nav__link">
       Report a new issue
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://bugs.eclipse.org/bugs/buglist.cgi?product=epsilon&cmdtype=doit&order=Reuse+same+sort+as+last+time&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&bug_severity=blocker&bug_severity=critical&bug_severity=major&bug_severity=normal&bug_severity=minor&bug_severity=trivial" title="View open bugs" class="md-nav__link">
       View open bugs
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://bugs.eclipse.org/bugs/buglist.cgi?product=epsilon&cmdtype=doit&order=Reuse+same+sort+as+last+time&bug_status=UNCONFIRMED&bug_status=NEW&bug_status=ASSIGNED&bug_status=REOPENED&bug_severity=enhancement" title="View enhancement requests" class="md-nav__link">
       View enhancement requests
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://bugs.eclipse.org/bugs/buglist.cgi?bug_status=RESOLVED&list_id=17694438&product=epsilon&query_format=advanced" title="View issues resolved since the last stable release" class="md-nav__link">
       View issues resolved since the last stable release
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://bugs.eclipse.org/bugs/buglist.cgi?product=epsilon&cmdtype=doit&order=Reuse+same+sort+as+last+time" title="View all issues" class="md-nav__link">
       View all issues
     </a>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-nav__toggle md-toggle" data-md-toggle="nav-5" type="checkbox" id="nav-5">

     <label class="md-nav__link" for="nav-5">
       Community
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59 16.58L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.42z"/></svg>
       </span>
     </label>
     <nav class="md-nav" aria-label="Community" data-md-level="1">
       <label class="md-nav__title" for="nav-5">
         <span class="md-nav__icon md-icon">
           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
         </span>
         Community
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item md-nav__item--nested">

       <input class="md-nav__toggle md-toggle" data-md-toggle="nav-5-1" type="checkbox" id="nav-5-1">

     <label class="md-nav__link" for="nav-5-1">
       Who is using Epsilon?
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M8.59 16.58L13.17 12 8.59 7.41 10 6l6 6-6 6-1.41-1.42z"/></svg>
       </span>
     </label>
     <nav class="md-nav" aria-label="Who is using Epsilon?" data-md-level="2">
       <label class="md-nav__title" for="nav-5-1">
         <span class="md-nav__icon md-icon">
           <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
         </span>
         Who is using Epsilon?
       </label>
       <ul class="md-nav__list" data-md-scrollfix>


   <li class="md-nav__item">
     <a href="../../../users/" title="Industry" class="md-nav__link">
       Industry
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../../users/education/" title="Education" class="md-nav__link">
       Education
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../../users/open-source/" title="Open-source projects" class="md-nav__link">
       Open-source projects
     </a>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item">
     <a href="https://projects.eclipse.org/projects/modeling.epsilon/who" title="Who is developing Epsilon?" class="md-nav__link">
       Who is developing Epsilon?
     </a>
   </li>


   <li class="md-nav__item">
     <a href="https://www.eclipse.org/forums/index.php/f/22/" title="Forum" class="md-nav__link">
       Forum
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../../labs/" title="Epsilon Labs" class="md-nav__link">
       Epsilon Labs
     </a>
   </li>


   <li class="md-nav__item">
     <a href="../../../faq/" title="Frequently asked questions" class="md-nav__link">
       Frequently asked questions
     </a>
   </li>


       </ul>
     </nav>
   </li>


   <li class="md-nav__item">
     <a href="../../../branding/" title="Branding" class="md-nav__link">
       Branding
     </a>
   </li>


   </ul>
 </nav>
                   </div>
                 </div>
               </div>


               <div class="md-sidebar md-sidebar--secondary" data-md-component="toc">
                 <div class="md-sidebar__scrollwrap">
                   <div class="md-sidebar__inner">

 <nav class="md-nav md-nav--secondary" aria-label="Table of contents">


     <label class="md-nav__title" for="__toc">
       <span class="md-nav__icon md-icon">
         <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M20 11v2H8l5.5 5.5-1.42 1.42L4.16 12l7.92-7.92L13.5 5.5 8 11h12z"/></svg>
       </span>
       Table of contents
     </label>
     <ul class="md-nav__list" data-md-scrollfix>

         <li class="md-nav__item">
   <a href="#prerequisites" class="md-nav__link">
     Prerequisites
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#create-a-new-project" class="md-nav__link">
     Create a new project
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#create-libraryemf" class="md-nav__link">
     Create library.emf
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#add-content-to-libraryemf" class="md-nav__link">
     Add content to library.emf
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#generate-libraryecore-from-libraryemf" class="md-nav__link">
     Generate library.ecore from library.emf
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#register-libraryecore" class="md-nav__link">
     Register library.ecore
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#create-a-model-that-conforms-to-libraryecore" class="md-nav__link">
     Create a model that conforms to library.ecore
   </a>

 </li>

         <li class="md-nav__item">
   <a href="#add-content-to-mylibrarymodel" class="md-nav__link">
     Add content to mylibrary.model
   </a>

 </li>

     </ul>

 </nav>
                   </div>
                 </div>
               </div>


           <div class="md-content">
             <article class="md-content__inner md-typeset">


                 <h1 id="reflective-emf-tutorial">Reflective EMF Tutorial<a class="headerlink" href="#reflective-emf-tutorial" title="Permanent link">&para;</a></h1>
 <p>This tutorial demonstrates how to create an EMF Ecore metamodel and a sample model that conforms to it reflectively (i.e. without generating any code).</p>
 <h2 id="prerequisites">Prerequisites<a class="headerlink" href="#prerequisites" title="Permanent link">&para;</a></h2>
 <p>To go through this tutorial you need to first install the Eclipse Modeling Distribution, Epsilon and Emfatic. Installation instructions are available <a href="../../../download">here</a>.</p>
 <h2 id="create-a-new-project">Create a new project<a class="headerlink" href="#create-a-new-project" title="Permanent link">&para;</a></h2>
 <p>Go to <code>File-&gt;New-&gt;Other...</code> and select <code>General-&gt;Project</code>. Type <code>library</code> as the project name:</p>
 <p><img alt="" src="new-project.jpg" /></p>
 <h2 id="create-libraryemf">Create library.emf<a class="headerlink" href="#create-libraryemf" title="Permanent link">&para;</a></h2>
 <p>Go to <code>File-&gt;New-&gt;Other...</code> and select <code>File</code>. Type <code>library.emf</code> as the file name:</p>
 <p><img alt="" src="create-emfatic.jpg" /></p>
 <p>This is where we'll specify our Ecore metamodel using the Emfatic textual syntax</p>
 <h2 id="add-content-to-libraryemf">Add content to library.emf<a class="headerlink" href="#add-content-to-libraryemf" title="Permanent link">&para;</a></h2>
 <p>Now <code>library.emf</code> should be open and you can copy-paste the following text into it (our sample metamodel) and save.</p>
 <pre class="prettyprint lang-emf"><code>@namespace(uri="library", prefix="")
 package library;

 class Library {
    val Writer[*] writers;
    val Book[*] books;
 }

 class Writer {
    attr String name;
    ref Book[*] books;
 }

 class Book {
    attr String title;
    attr int pages = 100;
    attr BookCategory category;
 }

 enum BookCategory {
    Mystery;
    ScienceFiction;
    Biography;
 }</code></pre>

 <p>Now your <code>library.emf</code> editor should look like this:</p>
 <p><img alt="" src="emfatic-editor.png" /></p>
 <h2 id="generate-libraryecore-from-libraryemf">Generate library.ecore from library.emf<a class="headerlink" href="#generate-libraryecore-from-libraryemf" title="Permanent link">&para;</a></h2>
 <p>The next step is to generate a proper XMI-based Ecore metamodel from the Emfatic textual representation. To do this, you can right-click <code>library.emf</code> and select <code>Generate Ecore model</code> as shown below:</p>
 <p><img alt="" src="generate-ecore.png" /></p>
 <p>Once you've done this you should have a new file called <code>library.ecore</code> sitting next to your <code>library.emf</code>. Congratulations! You're half-way there!</p>
 <div class="admonition info">
 <p class="admonition-title">Tip</p>
 <p>If at some point you change <code>library.emf</code>, you need to repeat this step in order to update <code>library.ecore</code>.</p>
 </div>
 <h2 id="register-libraryecore">Register library.ecore<a class="headerlink" href="#register-libraryecore" title="Permanent link">&para;</a></h2>
 <p>The next step is to let EMF know of the existence of your newly created <code>library.ecore</code> metamodel. To do this, right-click <code>library.ecore</code> and select <code>Register EPackages</code> as shown below:</p>
 <p><img alt="" src="register-epackages.png" /></p>
 <h2 id="create-a-model-that-conforms-to-libraryecore">Create a model that conforms to library.ecore<a class="headerlink" href="#create-a-model-that-conforms-to-libraryecore" title="Permanent link">&para;</a></h2>
 <p>Now we're ready to create models that conform to our new Ecore metamodel! To create a model, go to <code>File-&gt;New-&gt;Other...</code> and select <code>EMF Model</code> as shown below:</p>
 <p><img alt="" src="create-emf-model.jpg" /></p>
 <p>Click <code>Next</code> and set the name of the model to <code>mylibrary.model</code>:</p>
 <p><img alt="" src="set-emf-model-name.jpg" /></p>
 <p>Then hit the <code>Browse...</code> button next to the <code>Metamodel URI</code> field and select <code>library</code> in the list that pops up:</p>
 <p><img alt="" src="set-emf-model-namespace.jpg" /></p>
 <p>Finally, select <code>Library</code> from the <code>Root instance type</code> combo box and hit <code>Finish</code>:</p>
 <p><img alt="" src="set-emf-model-root.jpg" /></p>
 <p>Now <code>mylibrary.model</code> should be open in a tree-based editor:</p>
 <p><img alt="" src="empty-model.jpg" /></p>
 <h2 id="add-content-to-mylibrarymodel">Add content to mylibrary.model<a class="headerlink" href="#add-content-to-mylibrarymodel" title="Permanent link">&para;</a></h2>
 <p>To create a new <code>Book</code> under the library, you can right-click it and select <code>New Child-&gt;Books Book</code></p>
 <p><img alt="" src="create-book.png" /></p>
 <p>To set the title of the new book, you can right-click it and select <code>Show Properties View</code></p>
 <p><img alt="" src="show-properties-view.png" /></p>
 <p>Then, in the <code>Title</code> field of the <code>Properties</code> view, you can type the name of the book:</p>
 <p><img alt="" src="set-book-name.jpg" /></p>
 <div class="admonition success">
 <p class="admonition-title">Congratulations!</p>
 <p>You've just created your first EMF model!</p>
 </div>


             </article>
           </div>
         </div>
       </main>


 <footer class="md-footer">

   <div class="md-footer-meta md-typeset">
     <div class="md-footer-meta__inner md-grid">
       <div class="md-footer-copyright">

           <div class="md-footer-copyright__highlight">
             Copyright © Eclipse Foundation, Inc. All Rights Reserved.
           </div>

         powered by
         <a href="https://www.mkdocs.org">MkDocs</a>
         and
         <a href="https://squidfunk.github.io/mkdocs-material/">Material for MkDocs</a>
       </div>
       <div class="md-footer-copyright epsilon-eclipse-links">
           <ul>
               <li><a href="https://www.eclipse.org/legal/privacy.php">Privacy Policy</a></li>
               <li><a href="https://www.eclipse.org/legal/termsofuse.php">Terms of Use</a></li>
               <li><a href="https://www.eclipse.org/legal/copyright.php">Copyright Agent</a></li>
           </ul>
       </div>

     </div>
   </div>
 </footer>

     </div>

       <script src="../../../assets/javascripts/vendor.d710d30a.min.js"></script>
       <script src="../../../assets/javascripts/bundle.b39636ac.min.js"></script><script id="__lang" type="application/json">{"clipboard.copy": "Copy to clipboard", "clipboard.copied": "Copied to clipboard", "search.config.lang": "en", "search.config.pipeline": "trimmer, stopWordFilter", "search.config.separator": "[\\s\\-]+", "search.result.placeholder": "Type to start searching", "search.result.none": "No matching documents", "search.result.one": "1 matching document", "search.result.other": "# matching documents"}</script>

       <script>
         app = initialize({
           base: "../../..",
           features: [],
           search: Object.assign({
             worker: "../../../assets/javascripts/worker/search.a68abb33.min.js"
           }, typeof search !== "undefined" && search)
         })
       </script>

         <script src="https://unpkg.com/mermaid@8.5.1/dist/mermaid.min.js"></script>

         <script src="../../../assets/javascript/mermaid.js"></script>

         <script src="../../../assets/javascript/jquery.js"></script>

         <script src="../../../assets/javascript/google-code-prettify/prettify.js"></script>

         <script src="../../../assets/javascript/google-code-prettify/lang-emfatic.js"></script>

         <script src="../../../assets/javascript/google-code-prettify/lang-epsilon.js"></script>

         <script src="../../../assets/javascript/google-code-prettify/prettyprint.js"></script>


   </body>
 </html>