If you have an Empower support login (not just a documentation login), you can use the Software AG Installer from Empower to install the “Tamino X-Tools”, which includes the Tamino Schema Editor.
https://empower.softwareag.com, then click on the “Software Downloads” in the “Download Products” box (bottom right of centre panel)
AFAIK it is not available as a Community download.
#Tamino#webMethods#API-Management