diff --git a/aio/transforms/angular.io-package/index.js b/aio/transforms/angular.io-package/index.js
index d696d9d9bf..5c1546cfd4 100644
--- a/aio/transforms/angular.io-package/index.js
+++ b/aio/transforms/angular.io-package/index.js
@@ -46,6 +46,7 @@ module.exports =
         .processor(require('./processors/matchUpDirectiveDecorators'))
         .processor(require('./processors/filterMemberDocs'))
         .processor(require('./processors/convertToJson'))
+        .processor(require('./processors/markBarredODocsAsPrivate'))
 
         // overrides base packageInfo and returns the one for the 'angular/angular' repo.
         .factory('packageInfo', function() { return require(path.resolve(PROJECT_ROOT, 'package.json')); })
diff --git a/aio/transforms/angular.io-package/processors/generateApiListDoc.js b/aio/transforms/angular.io-package/processors/generateApiListDoc.js
index fbc42a449b..f2311adcc1 100644
--- a/aio/transforms/angular.io-package/processors/generateApiListDoc.js
+++ b/aio/transforms/angular.io-package/processors/generateApiListDoc.js
@@ -24,7 +24,9 @@ function getModuleInfo(moduleDoc) {
   return {
     name: moduleName.toLowerCase(),
     title: moduleName,
-    items: moduleDoc.exports.filter(doc => !doc.internal).map(getExportInfo)
+    items: moduleDoc.exports
+                  // Ignore internals and private exports (indicated by the ɵ prefix)
+                  .filter(doc => !doc.internal && !doc.privateExport).map(getExportInfo)
   };
 }
 
diff --git a/aio/transforms/angular.io-package/processors/generateApiListDoc.spec.js b/aio/transforms/angular.io-package/processors/generateApiListDoc.spec.js
index a8e2fa32c1..515dccce8c 100644
--- a/aio/transforms/angular.io-package/processors/generateApiListDoc.spec.js
+++ b/aio/transforms/angular.io-package/processors/generateApiListDoc.spec.js
@@ -83,11 +83,12 @@ describe('generateApiListDoc processor', () => {
     ]);
   });
 
-  it('should ignore internal exports', () => {
+  it('should ignore internal and private exports', () => {
     const processor = processorFactory();
     const docs = [
       { docType: 'module', id: '@angular/common/index', exports: [
         { docType: 'directive', name: 'AaaAaa', path: 'aaa', internal: true },
+        { docType: 'class', name: 'XxxXxx', path: 'xxx', privateExport: true },
         { docType: 'pipe', name: 'BbbBbb', path: 'bbb' }
       ]}
     ];
diff --git a/aio/transforms/angular.io-package/processors/generateKeywords.js b/aio/transforms/angular.io-package/processors/generateKeywords.js
index 4af71f681a..9e16cefa04 100644
--- a/aio/transforms/angular.io-package/processors/generateKeywords.js
+++ b/aio/transforms/angular.io-package/processors/generateKeywords.js
@@ -76,8 +76,11 @@ module.exports = function generateKeywordsProcessor(log, readFilesProcessor) {
       }
 
 
-      // We are only interested in docs that live in the right area
-      const filteredDocs = docs.filter(function(doc) { return !docTypesToIgnore[doc.docType]; });
+      const filteredDocs = docs
+          // We are not interested in some docTypes
+          .filter(function(doc) { return !docTypesToIgnore[doc.docType]; })
+          // Ignore internals and private exports (indicated by the ɵ prefix)
+          .filter(function(doc) { return !doc.internal && !doc.privateExport; });
 
       filteredDocs.forEach(function(doc) {
 
diff --git a/aio/transforms/angular.io-package/processors/generateKeywords.spec.js b/aio/transforms/angular.io-package/processors/generateKeywords.spec.js
new file mode 100644
index 0000000000..fbd33bda2d
--- /dev/null
+++ b/aio/transforms/angular.io-package/processors/generateKeywords.spec.js
@@ -0,0 +1,41 @@
+const testPackage = require('../../helpers/test-package');
+const mockLogger = require('dgeni/lib/mocks/log')(false);
+const processorFactory = require('./generateKeywords');
+const Dgeni = require('dgeni');
+
+const mockReadFilesProcessor = {
+  basePath: 'base/path'
+};
+
+describe('generateKeywords processor', () => {
+
+  it('should be available on the injector', () => {
+    const dgeni = new Dgeni([testPackage('angular.io-package')]);
+    const injector = dgeni.configureInjector();
+    const processor = injector.get('generateKeywordsProcessor');
+    expect(processor.$process).toBeDefined();
+  });
+
+  it('should run after "paths-computed"', () => {
+    const processor = processorFactory(mockLogger, mockReadFilesProcessor);
+    expect(processor.$runAfter).toEqual(['paths-computed']);
+  });
+
+  it('should run before "rendering-docs"', () => {
+    const processor = processorFactory(mockLogger, mockReadFilesProcessor);
+    expect(processor.$runBefore).toEqual(['rendering-docs']);
+  });
+
+  it('should ignore internal and private exports', () => {
+    const processor = processorFactory(mockLogger, mockReadFilesProcessor);
+    const docs = [
+      { docType: 'class', name: 'PublicExport' },
+      { docType: 'class', name: 'PrivateExport', privateExport: true },
+      { docType: 'class', name: 'InternalExport', internal: true }
+    ];
+    processor.$process(docs);
+    expect(docs[docs.length - 1].data).toEqual([
+      jasmine.objectContaining({ title: 'PublicExport', type: 'class'})
+    ]);
+  });
+});
diff --git a/aio/transforms/angular.io-package/processors/markBarredODocsAsPrivate.js b/aio/transforms/angular.io-package/processors/markBarredODocsAsPrivate.js
new file mode 100644
index 0000000000..702811b562
--- /dev/null
+++ b/aio/transforms/angular.io-package/processors/markBarredODocsAsPrivate.js
@@ -0,0 +1,13 @@
+module.exports = function markBarredODocsAsPrivate() {
+  return {
+    $runAfter: ['readTypeScriptModules'],
+    $runBefore: ['adding-extra-docs'],
+    $process: function(docs) {
+      docs.forEach(doc => {
+        if (doc.name && doc.name.indexOf('ɵ') === 0) {
+          doc.privateExport = true;
+        }
+      });
+    }
+  };
+};
diff --git a/aio/transforms/angular.io-package/processors/markBarredODocsAsPrivate.spec.js b/aio/transforms/angular.io-package/processors/markBarredODocsAsPrivate.spec.js
new file mode 100644
index 0000000000..c2a403d1a9
--- /dev/null
+++ b/aio/transforms/angular.io-package/processors/markBarredODocsAsPrivate.spec.js
@@ -0,0 +1,28 @@
+const testPackage = require('../../helpers/test-package');
+const processorFactory = require('./markBarredODocsAsPrivate');
+const Dgeni = require('dgeni');
+
+describe('generateApiListDoc processor', () => {
+
+  it('should be available on the injector', () => {
+    const dgeni = new Dgeni([testPackage('angular.io-package')]);
+    const injector = dgeni.configureInjector();
+    const processor = injector.get('markBarredODocsAsPrivate');
+    expect(processor.$process).toBeDefined();
+    expect(processor.$runAfter).toContain('readTypeScriptModules');
+    expect(processor.$runBefore).toContain('adding-extra-docs');
+  });
+
+  it('should mark docs starting with barred-o ɵ as private', () => {
+    const processor = processorFactory();
+    const docs = [
+      { name: 'ɵPrivate' },
+      { name: 'public' }
+    ]
+    processor.$process(docs);
+
+    expect(docs[0].privateExport).toBeTruthy();
+    expect(docs[1].privateExport).toBeFalsy();
+  });
+});
+