Same as other commenters, you removed the information about that this coordinate means. Does <point x=10 y=10/> means I will trace a line to 10,10, move to 10,10, trace a bezier curve, ...

This could be a better format, but still a lot heaver in term of bandwidth.

  <path>
    <move x=10 y=10/>
    <line x=90 y=10/>
    <curve x=90 y=90/>
    <end/>
  </path>