# description
A set of generally useful codes defined so they can be included in value sets.

# concept[].definition
The content is greater than zero, but too small to be quantified.

# concept[].extension[].valueString
used in formulations (e.g. 'Add 10mg of ingredient X, 50mg of ingredient Y, and sufficient quantity of water to 100mL.' This code would be used to express the quantity of water. )

# concept[].definition
The specific quantity is not known, but is known to be non-zero and is not specified because it makes up the bulk of the material.

# concept[].definition
The are no known applicable values in this context.