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DMX Notifications

The DMX Notifications plugin makes it easy for developers to create persistent notifications across sessions and screens.

Important: There are several privacy-related issues unsolved (see The current version is experimental and released for DEMO purposes only. Furthermore, the type definition should not be used as a template for other plugins (see The latest version does not resemble the feature of the DM 4 version yet (see

The use case is:

A user subscribes a topic. The user is notified when the topic is changed.

Actually the plugin provides:

  • A Notification model (a Topic Type representing a message)
  • A Subscription model (an Association Type for the configurations)
  • A service to
    • Manage subscriptions (subscribe/unsubscribe)
    • Create notifications (persistent notifcations for all users who subscribed given item)

Notifications Model

The following figure you find an overview of the type definitionst dmx-notifications installs in DMX.

Screenshot of Notification Model in DMX, Selected TopicType Notification

Usage: Subscribe items to receive notifications

A subscription is created using the "Subscribe" (resp. "Unsubscribe") context command on eligible topics.

Accessing notifications (In-App)

When logged in you find your notifications behind the Envelope-icon in the upper right corner of the window. A badge indicates your unread notifications.


DMX 5.2 is a platform for collaboration and knowledge management.


DMX Notifications is available freely under the GNU Affero General Public License, version 3 or later (see License).

Version History

2.0.1, Upcoming

  • Adapted to be compatible with DMX 5.2
  • Support for display new and old value on note edits is back

2.0.0, Jan 04, 2021

  • Data model and backend compatible with DMX 5.1
  • Rewritten webclient integration with context commands, envelope icon and a badge indicating unread notifications
  • New GUI to list, mark, reveal and delete notifications
  • Completely revised notification titles
  • "Diffs" upon Note edits are currently not supported (see
  • Your subscriptions and notifications may be READ-able for other users (depending on their workspace assignment)

1.2, Aug 11, 2017

Maintenance release:

  • Adapted to be compatible with DeepaMehta 4.8.6 and DM 4 Websockets 0.4

1.1, Jan 04, 2017

  • Renamed plugin to dm4-notifications as the new better expresses what this plugin is all about
  • Removed dependency to dm4.tags module
  • Introduced Subscribe topic command
  • Renamed all type URIs
  • Allows to create subscriptions around any type of topic
  • Adapted client side plugin.js to receive websocket notifications (broadcasts)
  • Associates subscriptions to (public) username instead of (private) user account topics
  • Stores all notifications in the "Private Workspace of the subscribed user
  • Per default: Support subscriptions of changes in a Workspace (New Topicmaps), in a Topicmap (Topics added) or to a Notes (Content updated)
  • Compatible with DeepaMehta 4.8

Note: This release is not compatible with previous releases and there is no migration provided.

1.0.3, Dec 25, 2014

  • compatible with DeepaMehta 4.4
  • code revision

1.0.2, Nov 17, 2014

  • revised service method signatures
  • introducing some javadoc
  • compatible with DM 4.3

1.0.0, May 13 2014

  • Introducing persistent Notifications and a Subscription edge
  • compatible with DM4.2


Copyright (C) 2014-2019 Malte Reißig

Copyright (C) 2020-2021 DMX Systems


Realizes persistent notifications for users of DMX across sessions and screens.





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