Commodity Code

selenium

http://resource.geosciml.org/classifier/cgi/commodity-code/selenium

definition Selenium is a chemical element with symbol Se and atomic number 34. It is a nonmetal with properties that are intermediate between those of its periodic table column-adjacent chalcogen elements sulfur and tellurium. It rarely occurs in its elemental state in nature, or as pure ore compounds. more like this
notation
02.03.05 more like this
Se more like this
source http://en.wikipedia.org/wiki/Selenium more like this
type
Resource
Concept
broader non metal
narrower selenium
in scheme commodity code
is primary topic of selenium