/*!
\page usdRi_page_front UsdRi: USD Renderman Schemas
\if ( PIXAR_MFB_BUILD )
\mainpage  UsdRi: USD Renderman Schemas
\publicLib
\endif

\section usdRi_overview Overview

This module provides schemas and utilities for authoring USD that encodes
Renderman-specific information, and for converting between USD and Ri
values and datatypes.  There is no inclusion of Renderman headers, so this
schema module is compilable and useful regardless of whether you have or use
Renderman.

The primary classes are:

\li UsdRiStatements, which provides API for encoding most Renderman specific 
concepts, like Ri Attributes, and (scoped) coordinate systems.

\li UsdRiLookAPI, UsdRiRisBxdf and several other shading-schema-related
classes for encoding Renderman shading interfaces and networks in the UsdShade
shading model.

\li \ref usdRi/rmanUtilities.h prvides usd/ri conversion utilities

\li The UsdRiPxr...LightFilter classes, representing extensions to the
    core UsdLight schemas specific to Renderman

*/