I ask a lot of questions about the programmable pipeline in OpenGL and OpenGL ES 2.0 and these two APIs are very similar in many respects. My questions generally apply directly to using either API, such as the shader language that is common to both, or the way you send matrix data to the server in both; in fact cross-platform development in this area allows for the same code to be written for both APIs.
For some reason, despite the applicability of my questions to both tags, a particular user is constantly removing my tag for one or the other API (though strangely, it is inconsistent about which tag gets removed).
I'd like some clarification here because my efforts to get any rational explanation from him on why he constantly retags my questions are failing to produce any meaningful answer. If it was just one question, this would be a small point, but it's quite a large number of questions by myself and others working in this area.
Can anyone explain exactly what the rule is for tagging questions for a particular API? If your question applies directly to multiple APIs, is it against the "rules" to tag more than one API?