<http://schema.org/about>
"The shaky economy has caused gold prices to shoot up to over $900 per ounce - even though 85 percent of gold mined these days goes to jewelry, and there's no \"gold standard\" backing currencies, gold is considered a valued"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/corporate-responsibility/gold-fever-leads-to-metal-mining-in-garbage-dumps-and-sewage-sludge.html>