diff --git a/cases/0-hello-world/src/index.heta b/cases/0-hello-world/src/index.heta
index a5de3841..a98c3c46 100644
--- a/cases/0-hello-world/src/index.heta
+++ b/cases/0-hello-world/src/index.heta
@@ -100,3 +100,6 @@ graph #export {
   format: Dot,
   filepath: graph
 };
+summary0 #export {
+  format: Summary
+};
\ No newline at end of file
diff --git a/src/browser.js b/src/browser.js
index 52e77051..33695132 100644
--- a/src/browser.js
+++ b/src/browser.js
@@ -23,6 +23,7 @@ global.compiledTemplates = {
   'heta-code.heta.njk': nunjucksEnv.getTemplate('heta-code.heta.njk'),
   'dbsolve-model.slv.njk': nunjucksEnv.getTemplate('dbsolve-model.slv.njk'),
   'dot.dot.njk': nunjucksEnv.getTemplate('dot.dot.njk'),
+  'summary.md.njk': nunjucksEnv.getTemplate('summary.md.njk'),
   'julia-model.jl.njk': nunjucksEnv.getTemplate('julia-model.jl.njk'),
   'julia-run.jl.njk': nunjucksEnv.getTemplate('julia-run.jl.njk'),
   'matlab-model.m.njk': nunjucksEnv.getTemplate('matlab-model.m.njk'),
@@ -58,6 +59,7 @@ Container._exportClasses = {
   Matlab: require('./matlab-export'),
   Julia: require('./julia-export'),
   Dot: require('./dot-export'),
+  Summary: require('./summary-export'),
 };
 
 module.exports = {
diff --git a/src/index.js b/src/index.js
index e437c3ee..6c81be71 100644
--- a/src/index.js
+++ b/src/index.js
@@ -12,6 +12,7 @@ global.compiledTemplates = {
   'heta-code.heta.njk': nunjucksEnv.getTemplate('heta-code.heta.njk'),
   'dbsolve-model.slv.njk': nunjucksEnv.getTemplate('dbsolve-model.slv.njk'),
   'dot.dot.njk': nunjucksEnv.getTemplate('dot.dot.njk'),
+  'summary.md.njk': nunjucksEnv.getTemplate('summary.md.njk'),
   'julia-model.jl.njk': nunjucksEnv.getTemplate('julia-model.jl.njk'),
   'julia-run.jl.njk': nunjucksEnv.getTemplate('julia-run.jl.njk'),
   'matlab-model.m.njk': nunjucksEnv.getTemplate('matlab-model.m.njk'),
@@ -47,6 +48,7 @@ Container._exportClasses = {
   Matlab: require('./matlab-export'),
   Julia: require('./julia-export'),
   Dot: require('./dot-export'),
+  Summary: require('./summary-export'),
 };
 
 module.exports = {
diff --git a/src/nunjucks-env.js b/src/nunjucks-env.js
index b5c9bd26..1cc05f47 100644
--- a/src/nunjucks-env.js
+++ b/src/nunjucks-env.js
@@ -6,10 +6,10 @@ module.exports = function(env) {
 
   // add Filteers for Environment
   env.addFilter('filter2', function(arr, path, value) {
-    return arr.filter((x) => _get(x, path)===value);
+    return [...arr].filter((x) => _get(x, path)===value);
   });
   env.addFilter('exclude2', function(arr, path, value) {
-    return arr.filter((x) => _get(x, path)!==value);
+    return [...arr].filter((x) => _get(x, path)!==value);
   });
   env.addFilter('getReactants', function(effectors) {
     return effectors
diff --git a/src/summary-export/index.js b/src/summary-export/index.js
new file mode 100644
index 00000000..ed47e40d
--- /dev/null
+++ b/src/summary-export/index.js
@@ -0,0 +1,56 @@
+/* global compiledTemplates */
+const { AbstractExport } = require('../abstract-export');
+const { ajv } = require('../utils');
+require('./namespace');
+
+const schema = {
+  type: 'object',
+  properties: {
+  }
+};
+
+class SummaryExport extends AbstractExport {
+  constructor(q = {}, isCore = false) {
+    super(q, isCore);
+
+    // check arguments here
+    let logger = this._container.logger;
+    let valid = SummaryExport.isValid(q, logger);
+    if (!valid) { this.errored = true; return; }
+  }
+  get className(){
+    return 'SummaryExport';
+  }
+  get format(){
+    return 'Summary';
+  }
+  get defaultFilepath() {
+    return 'summary';
+  }
+  makeText() {
+    let logger = this._container.logger;
+    let selectedNamespaces = this.selectedNamespaces();
+
+    let image = {
+      unitDefStorage: this._container.unitDefStorage,
+      functionDefStorage: this._container.functionDefStorage,
+      selectedNamespaces: selectedNamespaces,
+      namespaceStorage: this._container.namespaceStorage
+    };
+    let content = this.getDotCode(image);
+
+    return [{
+      content: content,
+      pathSuffix: '/platform.md',
+      type: 'text'
+    }];
+  }
+  getDotCode(image = {}) {
+    return compiledTemplates['summary.md.njk'].render(image);
+  }
+  static get validate() {
+    return ajv.compile(schema);
+  }
+}
+
+module.exports = SummaryExport;
diff --git a/src/summary-export/namespace.js b/src/summary-export/namespace.js
new file mode 100644
index 00000000..e69de29b
diff --git a/src/templates/summary.md.njk b/src/templates/summary.md.njk
new file mode 100644
index 00000000..b2e7bb0e
--- /dev/null
+++ b/src/templates/summary.md.njk
@@ -0,0 +1,74 @@
+# Summary for platform 
+
+## #defineFunction elements
+
+Total count: {{ functionDefStorage | length }}
+
+### Core
+
+{% for key, value in functionDefStorage | filter2('1.isCore', true) %}{{ value.id }}, {% endfor %}
+
+### User-defined
+
+{% set userFunctionDef = functionDefStorage | exclude2('1.isCore', true) %}
+{{- '-' if not userFunctionDef.length }}
+{%- for key, value in userFunctionDef %}{{ value.id }}, {% endfor %}
+
+## #defineUnit elements
+
+Total count: {{ unitDefStorage | length }}
+
+### Core
+
+{% for key, value in unitDefStorage | filter2('1.isCore', true) %}{{ value.id }}, {% endfor %}
+
+### User-defined
+
+{% set userUnitDef = unitDefStorage | exclude2('1.isCore', true) %}
+{{- '-' if not userUnitDef.length }}
+{%- for key, value in userUnitDef %}{{ value.id }}, {% endfor %}
+
+## #setNS elements
+
+Totalcount: {{ namespaceStorage | length }}
+
+{% for key, value in namespaceStorage %}{{ key }}, {% endfor %}
+
+{% for name, ns in selectedNamespaces %}
+## "{{ name }}" namespace ({{ 'abstract' if ns.isAbstract else 'concrete' }})
+
+Total count: {{ ns.size }}
+
+## @TimeScale
+
+{% for key, value in ns | filter2('1.className', 'TimeScale') %}{{ key }}, {% endfor %}
+
+## @Const
+
+{% for key, value in ns | filter2('1.className', 'Const') %}{{ key }}, {% endfor %}
+
+## @Record
+
+{% for key, value in ns | filter2('1.className', 'Record') %}{{ key }}, {% endfor %}
+
+## @Process
+
+{% for key, value in ns | filter2('1.className', 'Process') %}{{ key }}, {% endfor %}
+
+## @Compartment
+
+{% for key, value in ns | filter2('1.className', 'Compartment') %}{{ key }}, {% endfor %}
+
+## @Species
+
+{% for key, value in ns | filter2('1.className', 'Species') %}{{ key }}, {% endfor %}
+
+## @Reaction
+
+{% for key, value in ns | filter2('1.className', 'Reaction') %}{{ key }}, {% endfor %}
+
+## @TimeSwitcher
+
+{% for key, value in ns | filter2('1.className', 'TimeSwitcher') %}{{ key }}, {% endfor %}
+{# CSwitcher, DSwitcher, StopSwitcher, Dose, Page, #}
+{% endfor %}
diff --git a/src/webpack.js b/src/webpack.js
index c9ad0efd..80d64d2b 100644
--- a/src/webpack.js
+++ b/src/webpack.js
@@ -28,6 +28,7 @@ global.compiledTemplates = {
   'heta-code.heta.njk': require('./templates/heta-code.heta.njk'),
   'dbsolve-model.slv.njk': require('./templates/dbsolve-model.slv.njk'),
   'dot.dot.njk': require('./templates/dot.dot.njk'),
+  'summary.md.njk': require('summary.md.njk'),
   'julia-model.jl.njk': require('./templates/julia-model.jl.njk'),
   'julia-run.jl.njk': require('./templates/julia-run.jl.njk'),
   'matlab-model.m.njk': require('./templates/matlab-model.m.njk'),
@@ -63,6 +64,7 @@ Container._exportClasses = {
   Matlab: require('./matlab-export'),
   Julia: require('./julia-export'),
   Dot: require('./dot-export'),
+  Summary: require('./summary-export'),
 };
 
 module.exports = {