Ian Lynch wrote:
Think of it like this. If I have an equation like Y = Sin(x) it will
generate a nice oscillating curve. Now try and take a more complex curve
and work out the equation that generated it. Its not at all so easy. So
its quite easy to go from equations to curves, its a lot more difficult
to go from curves back to equations and not simply a matter of reversing
a formula.
Not to mention that not all transformations are bijections. It's
possible that going from ODT to PDF is relatively straight forward and
going from PDF to ODT is nearly impossible.
Consider a transformation that turns a Draw vector graphic into a PNG
bitmap. It would be impossible to turn that PNG back into a usable
vector graphic.
Cheers,
Daniel.
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