Sometimes, its just turtles, all the way down
Courtesy PHGCOM, CC A-S 3.0
Standards cover an awful lot of ground — how big things are; how much they weigh; how fast they go; how much power they consume; how pure they are; how they must be shaped so that they fit together — the list goes on and on. But despite the enormous range of characteristics that standards define, you notice that they all have one thing in common: you can describe them by using the word "how."
In short, standards relate to measurable things. Indeed, the earliest formal standards created in societies everywhere were usually those related to weights and measures. Invariably these were established when trade became more sophisticated than tribal bartering. Ever since, the history of standards has largely been one of establishing ways to define more and more measurable characteristics as they became important and as the scientific ability to test them came along.
There is, however, one exception to this rule. Curiously enough, it involves a standard that is as old as weights and measures themselves. And despite its ancient lineage, nations still can't agree for very long on what measuring stick should be used, or how it should work. This is rather remarkable, given that the standard in question is perhaps the only one that nearly everyone makes use of almost very day of their lives.
That standard, of course, is money — dollars, Euros, renminbi — each one a measure of value.