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blender/lib/usd/usdProc/resources/generatedSchema.usda

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+#usda 1.0
+(
+    "WARNING: THIS FILE IS GENERATED BY usdGenSchema.  DO NOT EDIT."
+)
+
+class GenerativeProcedural "GenerativeProcedural" (
+    doc = """
+    Represents an abstract generative procedural prim which delivers its input
+    parameters via properties (including relationships) within the \"primvars:\"
+    namespace.
+ 
+    It does not itself have any awareness or participation in the execution of
+    the procedural but rather serves as a means of delivering a procedural's
+    definition and input parameters.
+ 
+    The value of its \"proceduralSystem\" property (either authored or provided
+    by API schema fallback) indicates to which system the procedural definition
+    is meaningful.
+    """
+)
+{
+    float3[] extent (
+        doc = """Extent is a three dimensional range measuring the geometric
+        extent of the authored gprim in its own local space (i.e. its own
+        transform not applied), without accounting for any shader-induced
+        displacement. If __any__ extent value has been authored for a given 
+        Boundable, then it should be authored at every timeSample at which 
+        geometry-affecting properties are authored, to ensure correct 
+        evaluation via ComputeExtent(). If __no__ extent value has been 
+        authored, then ComputeExtent() will call the Boundable's registered 
+        ComputeExtentFunction(), which may be expensive, which is why we 
+        strongly encourage proper authoring of extent.
+        \\sa ComputeExtent()
+        \\sa \\ref UsdGeom_Boundable_Extent.
+        
+        An authored extent on a prim which has children is expected to include
+        the extent of all children, as they will be pruned from BBox computation
+        during traversal."""
+    )
+    token proceduralSystem (
+        doc = """The name or convention of the system responsible for evaluating
+        the procedural.
+        NOTE: A fallback value for this is typically set via an API schema."""
+    )
+    rel proxyPrim (
+        doc = '''The proxyPrim relationship allows us to link a
+        prim whose purpose is "render" to its (single target)
+        purpose="proxy" prim.  This is entirely optional, but can be
+        useful in several scenarios:
+        
+        - In a pipeline that does pruning (for complexity management)
+        by deactivating prims composed from asset references, when we
+        deactivate a purpose="render" prim, we will be able to discover
+        and additionally deactivate its associated purpose="proxy" prim,
+        so that preview renders reflect the pruning accurately.
+        
+        - DCC importers may be able to make more aggressive optimizations
+        for interactive processing and display if they can discover the proxy
+        for a given render prim.
+        
+        - With a little more work, a Hydra-based application will be able
+        to map a picked proxy prim back to its render geometry for selection.
+
+        \\note It is only valid to author the proxyPrim relationship on
+        prims whose purpose is "render".'''
+    )
+    uniform token purpose = "default" (
+        allowedTokens = ["default", "render", "proxy", "guide"]
+        doc = """Purpose is a classification of geometry into categories that 
+        can each be independently included or excluded from traversals of prims 
+        on a stage, such as rendering or bounding-box computation traversals.
+
+        See for more detail about how 
+        purpose is computed and used."""
+    )
+    token visibility = "inherited" (
+        allowedTokens = ["inherited", "invisible"]
+        doc = '''Visibility is meant to be the simplest form of "pruning" 
+        visibility that is supported by most DCC apps.  Visibility is 
+        animatable, allowing a sub-tree of geometry to be present for some 
+        segment of a shot, and absent from others; unlike the action of 
+        deactivating geometry prims, invisible geometry is still 
+        available for inspection, for positioning, for defining volumes, etc.'''
+    )
+    uniform token[] xformOpOrder (
+        doc = """Encodes the sequence of transformation operations in the
+        order in which they should be pushed onto a transform stack while
+        visiting a UsdStage's prims in a graph traversal that will effect
+        the desired positioning for this prim and its descendant prims.
+        
+        You should rarely, if ever, need to manipulate this attribute directly.
+        It is managed by the AddXformOp(), SetResetXformStack(), and
+        SetXformOpOrder(), and consulted by GetOrderedXformOps() and
+        GetLocalTransformation()."""
+    )
+}
+

blender/lib/usd/usdProc/resources/plugInfo.json

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+# Portions of this file auto-generated by usdGenSchema.
+# Edits will survive regeneration except for comments and
+# changes to types with autoGenerated=true.
+{
+    "Plugins": [
+        {
+            "Info": {
+                "Types": {
+                    "UsdProcGenerativeProcedural": {
+                        "alias": {
+                            "UsdSchemaBase": "GenerativeProcedural"
+                        }, 
+                        "autoGenerated": true, 
+                        "bases": [
+                            "UsdGeomBoundable"
+                        ], 
+                        "schemaKind": "concreteTyped"
+                    }
+                }
+            }, 
+            "LibraryPath": "", 
+            "Name": "usdProc", 
+            "ResourcePath": "resources", 
+            "Root": "..", 
+            "Type": "library"
+        }
+    ]
+}

blender/lib/usd/usdProc/resources/usdProc/schema.usda

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+#usda 1.0
+(
+    "This file describes the Pixar-specific USD Geometric schemata for code generation."
+    subLayers = [
+        @usdGeom/schema.usda@
+    ]
+)
+
+over "GLOBAL" (
+    customData = {
+        string libraryName           = "usdProc"
+        string libraryPath           = "pxr/usd/usdProc"
+        dictionary libraryTokens = {
+
+        }
+    }
+){
+}
+
+class GenerativeProcedural "GenerativeProcedural" (
+    inherits = </Boundable>
+    doc = """
+    Represents an abstract generative procedural prim which delivers its input
+    parameters via properties (including relationships) within the "primvars:"
+    namespace.
+ 
+    It does not itself have any awareness or participation in the execution of
+    the procedural but rather serves as a means of delivering a procedural's
+    definition and input parameters.
+ 
+    The value of its "proceduralSystem" property (either authored or provided
+    by API schema fallback) indicates to which system the procedural definition
+    is meaningful.
+    """
+    customData = {
+
+    }
+){
+
+    token proceduralSystem  (
+        doc = """The name or convention of the system responsible for evaluating
+        the procedural.
+        NOTE: A fallback value for this is typically set via an API schema."""
+    )
+}