What does "ISO standard equivalent" actually mean? I'm reading about comparison operators. In the documentation, Comparison Operators Modified by ANY, SOME, or ALL it says (emphasis added):


  Comparison operators that introduce a subquery can be modified by the
  keywords ALL or ANY. SOME is an ISO standard equivalent for ANY.


What does this mean?
It just means that operator SOME is not some MS proprietary extension. It is part of the (ISO/ANSI) SQL standard.