Why are different naming standards compatible for use in the international market?

Compatibility is based on standardized testing protocols rather than the name itself. Regardless of whether a cable is called WDZ-YJY or H07Z-R, it must pass the same critical global tests:

IEC 61034: Measurement of smoke density (ensuring visibility).

IEC 60754-1/2: Determination of halogen acid gas content and acidity (ensuring non-toxicity).

IEC 60332: Tests on flame propagation. As long as the cable meets these IEC (International Electrotechnical Commission) benchmarks, it is functionally compliant for global infrastructure projects.