<http://schema.org/about>
"Barcoding seems to be the conservation concept of the day, and that goes for sparing trees from illegal logging. The latest country to use the technology is Liberia, and at least one expert thinks that barcoding trees"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/natural-sciences/liberia-barcodes-its-trees-to-protect-rainforests.html>