The link https: //docs.camunda.org/manual/7.17/modeler/ points to the documentation for Camunda 8 Modeler. As far as I understand, they are not the same. Please advise.
they are the same. The Camunda Desktop Modeler can model C7 or C8 compliant models.
I was looking for documentation on the Inclusive Gateway, which is available in C7 but doesn’t seem to exist in C8. Is that due to incomplete documentation or the Inclusive Gateway (and others) are no longer available in C8?