glVertexAttribPointer in OpenGL and in OpenGLES

Question

I\'m reading tutorials about OpenGL and OpenGLES and I\'m a bit confused about the use of the function glVertexAttribPointer in these two APIs.

In the

Answer 1

GL spec clearly mentions this:

case 1: If a non-zero named buffer object is bound to the GL_ARRAY_BUFFER target while a generic vertex attribute array is specified, pointer is treated as a byte offset into the buffer object's data store.

case 2: Specifies a pointer to the first component of the first generic vertex attribute in the array.