Are you sure Eclipse is currently loading the plugin containing the Owl metamodel? in the About Eclipse window there should be an 'installation details' button. Click that and then click on the 'plugins' tab. Check there if the plugin you need is loaded. If so you should see the meta-model (double check the uri you are typing).
Are you sure Eclipse is currently loading the plugin containing the Owl metamodel? in the About Eclipse window there should be an 'installation details' button. Click that and then click on the 'plugins' tab. Check there if the plugin you need is loaded. If so you should see the meta-model (double check the uri you are typing).