+At the same time [Obeo's Target Platform Definition DSL and Generator tool](https://github.com/mbarbero/fr.obeo.releng.targetplatform)\r
+was taken into use for target platform definition.\r
+\r
+Please read the detailed installation and basic use instructions from the tool's website.\r
+\r
+To summarize, the basic idea is that the `.tpd` files are the canonical source\r
+files for the actual target definition `.target` files. Always modify the `.tpd`\r
+files and use *ALT+R* in the `.tpd` file editor or *CTRL+R* to generate the new\r
+.target file and take it into use immediately.\r
+\r
+## org.simantics.sdk.build.targetdefinition.tpd\r
+\r
+This is the platform definition used for building the Simantics SDK itself.\r