In the U.S., the typical track lighting track profiles are known as "H", "J" and "L". Their cross-sections can be easily found by googling them.
Are these same cross-sections used in Europe? If not, what cross-sections are used, and are there any standards that give the dimensions? As much as I can figure out, IEC 60570 unfortunately doesn't give standard track profile dimensions, only general requirements that place limits on some dimensions.