In one way the answer to your question is important but in another way you don't need to ask it...
The light bulb really doesn't care wich terminal is Live and which Neutral - apart from the Earth wire you have two wires coming from the ceiling and two wires on the pendant to connect to them - so just connect up any way that takes your fancy.
If the switch turns the light on and off then one of your ceiling wires is switched live and there's no problem for the time being - if the switch has no effect on the lamp then neither is switched live and you then have a problem to solve.
If the light fails to come on at all and the bulb is known good then it's probably best to call Mr Sparky.
Good luck... take care...
Peccavi
July 2009