diff --git a/features/federated.py b/features/federated.py
new file mode 100644
index 0000000..2e4486a
--- /dev/null
+++ b/features/federated.py
@@ -0,0 +1,78 @@
+# Copyright 2019 The Chromium Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style
+# license that can be found in the LICENSE file or at
+# https://developers.google.com/open-source/licenses/bsd
+
+"""Logic for storing and representing issues from external trackers."""
+
+from __future__ import print_function
+from __future__ import division
+from __future__ import absolute_import
+
+import re
+
+from framework.exceptions import InvalidExternalIssueReference
+
+
+class FederatedIssue(object):
+  """Abstract base class for holding one federated issue.
+
+  Each distinct external tracker should subclass this.
+  """
+  shortlink_re = None
+
+  def __init__(self, shortlink):
+    if not self.IsShortlinkValid(shortlink):
+      raise InvalidExternalIssueReference(
+          'Shortlink does not match any valid tracker: %s' % shortlink)
+
+    self.shortlink = shortlink
+
+  @classmethod
+  def IsShortlinkValid(cls, shortlink):
+    """Returns whether given shortlink is correctly formatted."""
+    if not cls.shortlink_re:
+      raise NotImplementedError()
+    return re.match(cls.shortlink_re, shortlink)
+
+
+class GoogleIssueTrackerIssue(FederatedIssue):
+  """Holds one Google Issue Tracker issue.
+
+  URL: https://issuetracker.google.com/
+  """
+  shortlink_re = r'^b\/\d+$'
+  url_format = 'https://issuetracker.google.com/issues/{issue_id}'
+
+  def __init__(self, shortlink):
+    super(GoogleIssueTrackerIssue, self).__init__(shortlink)
+    self.issue_id = int(self.shortlink[2:])
+
+  def ToURL(self):
+    return self.url_format.format(issue_id=self.issue_id)
+
+  def Summary(self):
+    """Returns a short string description for UI."""
+    return 'Google Issue Tracker issue %s.' % self.issue_id
+
+
+# All supported tracker classes.
+_federated_issue_classes = [GoogleIssueTrackerIssue]
+
+
+def IsShortlinkValid(shortlink):
+  """Returns whether the given string is valid for any issue tracker."""
+  return any(tracker_class.IsShortlinkValid(shortlink)
+      for tracker_class in _federated_issue_classes)
+
+
+def FromShortlink(shortlink):
+  """Returns a FederatedIssue for the first matching tracker.
+
+  If no matching tracker is found, returns None.
+  """
+  for tracker_class in _federated_issue_classes:
+    if tracker_class.IsShortlinkValid(shortlink):
+      return tracker_class(shortlink)
+
+  return None