Extension Manager terminology
In the context of the TYPO3 extension manager ("EM"), the words "install" and "uninstall" differ from their mainstream meaning. To avoid mixing these terms up with the other EM verbs, here is a clarification:
- Import means "downloading an extension from TER and copying it to typo3conf/ext/".
- Install means "activating the already imported extension inside the extension manager and performing database changes mandated by the extension".
- Uninstall means "deactivating an extension, but leaving it on the disk".
- Delete means "removing extension files permanently from disk".