The TDL tools are available as a set of Eclipse plug-ins. You need to first be able to run Eclipse. The [Eclipse Modeling Tools](https://www.eclipse.org/downloads/packages/release/2021-06/r/eclipse-modeling-tools) distribution contains most of the necessary prerequisites for the TDL tools.
Once Eclipse is up and running, the easiest way to install the TOP tools is from the Eclipse Marketplace - simply search for TDL in the Eclipse Marketplace client within Eclipse, or go to the [TOP Marketplace Listing](https://marketplace.eclipse.org/content/top-tdl-open-source-project) and drag the install button into the Eclipse window.
Once Eclipse is up and running, the easiest way to install the TOP tools is from the Eclipse Marketplace - simply search for TDL in the Eclipse Marketplace client within Eclipse, or go to the [TOP Marketplace Listing](https://marketplace.eclipse.org/content/top-tdl-open-source-project) and drag the install button into the Eclipse window. Select the desired features and proceed with the installation, which will require Eclipse to be restarted once the installation is finished.
Alternatively, you can install the plug-ins manually from an update site. In this case, you need to add the [update site](https://tdl.etsi.org/eclipse/latest/) for the TDL tools:
Alternatively, you can install the plug-ins manually from an update site. In this case, you need to add the [update site](https://top.etsi.org/ide/updatesite/stable) for the TDL tools:
https://tdl.etsi.org/eclipse/latest/
After the update site is added, the list of plug-ins and features shall be shown in the installation dialog (menu item Help->Install New Software..). Select the desired features and proceed with the installation, which will require Eclipse to be restarted once the installation is finished.
```
https://top.etsi.org/ide/updatesite/stable
```
To add the new repository to Eclipse, follow these steps:
