USD Terminology	Meaning
property	Parent class of attribute/relationship
prim	Container for your properties
layer	Container for storing your prims and properties
stage	A view of a set of composed layers
compose	Load a layer or another part of a hierarchy via a composition arc
author	Explicitly written value for a property/metadata entry (rather than it coming from a schema fallback)
Value Resolution Source	What layer(s) has the winning priority out of all your layers where the data can be loaded from