Description: defines a way to encapsulate a name in any registered name space, and label it with the the name space, producing a member of the universal product set known as URI of a product; Name: Product URI
Description: Unique global identification of the product using an universal resource identifier (URI); Name: URI of the product
Description: through a surface, product of the sound pressure, p, and the component of the particle velocity, un, at a point on the surface in the direction normal to the surface, integrated over that surface; Name: sound power