# QuantityLink

A QuantityLink is a Link representing the magnitude or the multitude of something, such as 10kg, 1s, $100, etc.

* PROPOSAL*: It is proposed that the name of this link be changed to

**UnitsLink**, as this link type has nothing at all to do with quantities, and everything to do with units. Please recall that the normal definition of a

*quantity*as a scalar value: the root-mean-square of a sine wave, the absolute value of a complex number, the length of an interval, the volume of some space, the length of a vector. All of thee quantities are normally unit-less: for example, what is the length of the complex number

*i*? Its not feet or inches. How about the distance between the numbers 1 and 2? The volume of a unit cube? These are all quantities, none of them have units. By contrast, one can talk about a cubic yard of cement, a foot-long hotdog, the reactivity of a capacitor (complex number

*i*, right there!!). These are physically meaningful, precisely because they have units. This link should be called

**UnitsLink**and not QuantityLink.

## Format

QuantityLink <Unit> NumberNode n

where Unit can be a ConceptNode or possibly, to be defined in the future, a UnitNode.

## Examples

10kg is represented by

QuantityLink ConceptNode "kilogram" NumberNode 10

1s is represented by

QuantityLink ConceptNode "second" NumberNode 1

$100 is represented by

QuantityLink ConceptNode "dollar" NumberNode 100