diff --git a/full_assets/CarbonFrameBike/index.usda b/full_assets/CarbonFrameBike/index.usda
index a27cce5c..15b7dccd 100644
--- a/full_assets/CarbonFrameBike/index.usda
+++ b/full_assets/CarbonFrameBike/index.usda
@@ -1,9 +1,16 @@
 #usda 1.0
 (
     defaultPrim = "CarbonFrameBike"
+    startTimeCode = 0
+    endTimeCode = 358.75
 )
 
 def "CarbonFrameBike" (
+    assetInfo = {
+        string name = "CarbonFrameBike"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./CarbonFrameBike.usdz@
 )
 {}
\ No newline at end of file
diff --git a/full_assets/ElephantWithMonochord/index.usda b/full_assets/ElephantWithMonochord/index.usda
index 9ab41227..6be89762 100644
--- a/full_assets/ElephantWithMonochord/index.usda
+++ b/full_assets/ElephantWithMonochord/index.usda
@@ -1,9 +1,18 @@
 #usda 1.0
 (
     defaultPrim = "ElephantWithMonochord"
+    startTimeCode = 0
+    endTimeCode = 3023
 )
 
 def "ElephantWithMonochord" (
+    assetInfo = {
+        string name = "ElephantWithMonochord"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./SoC-ElephantWithMonochord.usdc@
 )
-{}
\ No newline at end of file
+{
+}
+
diff --git a/full_assets/McUsd/index.usda b/full_assets/McUsd/index.usda
index 8f2e2a52..7fa231f0 100644
--- a/full_assets/McUsd/index.usda
+++ b/full_assets/McUsd/index.usda
@@ -4,6 +4,13 @@
 )
 
 def Xform "McUsd"
+(
+    assetInfo = {
+        string name = "McUsd"
+        string version = "1"
+    }
+    kind = "model"
+)
 {
     def "McUsd" (
         prepend references = @./McUsd.usdz@</McUsd>
diff --git a/full_assets/OpenChessSet/index.usda b/full_assets/OpenChessSet/index.usda
index f993645d..fadda661 100644
--- a/full_assets/OpenChessSet/index.usda
+++ b/full_assets/OpenChessSet/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "OpenChessSet" (
+    assetInfo = {
+        string name = "OpenChessSet"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./chess_set.usda@
 )
 {}
\ No newline at end of file
diff --git a/full_assets/StandardShaderBall/index.usda b/full_assets/StandardShaderBall/index.usda
index c4bc20ed..00ed4190 100644
--- a/full_assets/StandardShaderBall/index.usda
+++ b/full_assets/StandardShaderBall/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "StandardShaderBall" (
+    assetInfo = {
+        string name = "StandardShaderBall"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./standard_shader_ball_scene.usda@
     variants = {
         string example_material = "mtlx_gold"
diff --git a/full_assets/Teapot/index.usda b/full_assets/Teapot/index.usda
index c1657781..17e67abd 100644
--- a/full_assets/Teapot/index.usda
+++ b/full_assets/Teapot/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "Teapot" (
+    assetInfo = {
+        string name = "Teapot"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./Teapot.usd@
 )
 {}
\ No newline at end of file
diff --git a/full_assets/UsdCookie/index.usda b/full_assets/UsdCookie/index.usda
index 5b16fef6..19c74a98 100644
--- a/full_assets/UsdCookie/index.usda
+++ b/full_assets/UsdCookie/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "UsdCookie" (
+    assetInfo = {
+        string name = "UsdCookie"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./UsdCookie.usdz@
 )
 {}
\ No newline at end of file
diff --git a/full_assets/Vehicles/index.usda b/full_assets/Vehicles/index.usda
index ae466677..1546ca5a 100644
--- a/full_assets/Vehicles/index.usda
+++ b/full_assets/Vehicles/index.usda
@@ -4,26 +4,51 @@
 )
 
 def "FourWD" (
+    assetInfo = {
+        string name = "FourWD"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./USD_Mini_Car_Kit/assets/vehicles/4wd/asset/4wdFullAsset.usda@
 )
 {}
 
 def "Ambulance" (
+    assetInfo = {
+        string name = "Ambulance"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./USD_Mini_Car_Kit/assets/vehicles/ambulance/asset/ambulanceFullAsset.usda@
 )
 {}
 
 def "Formula" (
+    assetInfo = {
+        string name = "Formula"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./USD_Mini_Car_Kit/assets/vehicles/formula/asset/formulaFullAsset.usda@
 )
 {}
 
 def "Sedan" (
+    assetInfo = {
+        string name = "Sedan"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./USD_Mini_Car_Kit/assets/vehicles/sedan/asset/sedanFullAsset.usda@
 )
 {}
 
 def "Van" (
+    assetInfo = {
+        string name = "Van"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./USD_Mini_Car_Kit/assets/vehicles/van/asset/vanFullAsset.usda@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/AlphaBlendModeTest/index.usda b/test_assets/AlphaBlendModeTest/index.usda
index 9ea92c7d..f8b46649 100644
--- a/test_assets/AlphaBlendModeTest/index.usda
+++ b/test_assets/AlphaBlendModeTest/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "AlphaBlendModeTest" (
+    assetInfo = {
+        string name = "AlphaBlendModeTest"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./AlphaBlendModeTest.usd@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/AlphaBlendSortTest/index.usda b/test_assets/AlphaBlendSortTest/index.usda
index 065dc019..a5edb767 100644
--- a/test_assets/AlphaBlendSortTest/index.usda
+++ b/test_assets/AlphaBlendSortTest/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "AlphaBlendSortTest" (
+    assetInfo = {
+        string name = "AlphaBlendSortTest"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./AlphaBlendSortTest.usda@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/MaterialXTest/index.usda b/test_assets/MaterialXTest/index.usda
index ea2cfe2f..997ad620 100644
--- a/test_assets/MaterialXTest/index.usda
+++ b/test_assets/MaterialXTest/index.usda
@@ -4,22 +4,42 @@
 )
 
 def "Basic" (
+    assetInfo = {
+        string name = "MaterialX Basic"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./basic.usda@
 )
 {}
 
 def "Basic_Flatten" (
+    assetInfo = {
+        string name = "MaterialX Basic_Flatten"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./basic_flatten.usda@
 )
 {}
 
 
 def "BasicTextured" (
+    assetInfo = {
+        string name = "MaterialX BasicTextured"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./basicTextured.usda@
 )
 {}
 
 def "BasicTextured_Flatten" (
+    assetInfo = {
+        string name = "MaterialX BasicTextured_Flatten"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./basicTextured_flatten.usda@
 )
 {}
diff --git a/test_assets/NormalsTextureBiasAndScale/index.usda b/test_assets/NormalsTextureBiasAndScale/index.usda
index 8dbdfcec..7d351440 100644
--- a/test_assets/NormalsTextureBiasAndScale/index.usda
+++ b/test_assets/NormalsTextureBiasAndScale/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "NormalsTextureBiasAndScale" (
+    assetInfo = {
+        string name = "NormalsTextureBiasAndScale"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./NormalsTextureBiasAndScale.usda@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/RoughnessTest/index.usda b/test_assets/RoughnessTest/index.usda
index 2e133416..3acf3bfd 100644
--- a/test_assets/RoughnessTest/index.usda
+++ b/test_assets/RoughnessTest/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "RoughnessTest" (
+    assetInfo = {
+        string name = "RoughnessTest"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./RoughnessTest.usdz@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/TextureCoordinateTest/index.usda b/test_assets/TextureCoordinateTest/index.usda
index 96d077fe..24974bf1 100644
--- a/test_assets/TextureCoordinateTest/index.usda
+++ b/test_assets/TextureCoordinateTest/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "TextureCoordinateTest" (
+    assetInfo = {
+        string name = "TextureCoordinateTest"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./TextureCoordinateTest.usda@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/TextureTransformTest/index.usda b/test_assets/TextureTransformTest/index.usda
index 854a8f3c..3fc71a62 100644
--- a/test_assets/TextureTransformTest/index.usda
+++ b/test_assets/TextureTransformTest/index.usda
@@ -4,6 +4,11 @@
 )
 
 def "TextureTransformTest" (
+    assetInfo = {
+        string name = "TextureTransformTest"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./TextureTransformTest.usd@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/USDZ/index.usda b/test_assets/USDZ/index.usda
index 831ff067..26db28ee 100644
--- a/test_assets/USDZ/index.usda
+++ b/test_assets/USDZ/index.usda
@@ -6,47 +6,84 @@
 )
 
 def "AnimatedCube" (
+    assetInfo = {
+        string name = "AnimatedCube"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./AnimatedCube/AnimatedCube.usdz@
     active=false
 )
 {}
 
 def "AnimatedTriangle" (
+    assetInfo = {
+        string name = "AnimatedTriangle"
+        string version = "1"
+    }
     prepend references = @./AnimatedTriangle/AnimatedTriangle.usdz@
 )
 {}
 
 def "BoxAnimated" (
+    assetInfo = {
+        string name = "BoxAnimated"
+        string version = "1"
+    }
     prepend references = @./BoxAnimated/BoxAnimated.usdz@
 )
 {}
 
 def "BrainStem" (
+    assetInfo = {
+        string name = "BrainStem"
+        string version = "1"
+    }
     prepend references = @./BrainStem/BrainStem.usdz@
 )
 {}
 
 def "CesiumMan" (
+    assetInfo = {
+        string name = "CesiumMan"
+        string version = "1"
+    }
     prepend references = @./CesiumMan/CesiumMan.usdz@
 )
 {}
 
 def "DamagedHelmet" (
+    assetInfo = {
+        string name = "DamagedHelmet"
+        string version = "1"
+    }
     prepend references = @./DamagedHelmet/DamagedHelmet.usdz@
 )
 {}
 
 def "InterpolationTest" (
+    assetInfo = {
+        string name = "InterpolationTest"
+        string version = "1"
+    }
     prepend references = @./InterpolationTest/InterpolationTest.usdz@
 )
 {}
 
 def "RiggedFigure" (
+    assetInfo = {
+        string name = "RiggedFigure"
+        string version = "1"
+    }
     prepend references = @./RiggedFigure/RiggedFigure.usdz@
 )
 {}
 
 def "RiggedSimple" (
+    assetInfo = {
+        string name = "RiggedSimple"
+        string version = "1"
+    }
     prepend references = @./RiggedSimple/RiggedSimple.usdz@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/foundation/index.usda b/test_assets/foundation/index.usda
index 668767fc..a2b00f4d 100644
--- a/test_assets/foundation/index.usda
+++ b/test_assets/foundation/index.usda
@@ -3,7 +3,12 @@
     defaultPrim = "AlphaBlendModeTest"
 )
 
-def "AlphaBlendModeTest" (
+def "Foundation" (
+    assetInfo = {
+        string name = "Foundation"
+        string version = "1"
+    }
+    kind = "model"
     prepend references = @./AlphaBlendModeTest.usdz@
 )
 {}
\ No newline at end of file
diff --git a/test_assets/schemaTests/index.usda b/test_assets/schemaTests/index.usda
index 1b8ab0eb..026a98d6 100644
--- a/test_assets/schemaTests/index.usda
+++ b/test_assets/schemaTests/index.usda
@@ -3,106 +3,229 @@
 )
 
 def Scope "Extent"
-{
+(
+    kind = "group"
+){
     def "Regular_Extent" (
+        assetInfo = {
+            string name = "Regular_Extent"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/extent/regular_extent.usda@
     )
     {}
 
     def "Scaled_Extent" (
+        assetInfo = {
+            string name = "Scaled_Extent"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/extent/scaled_extent.usda@
     )
     {}
 
     def "Zero_Extent" (
+        assetInfo = {
+            string name = "Zero_Extent"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/extent/zero_extent.usda@
     )
     {}
 }
 
 def Scope "Meshes"
+(
+    kind = "group"
+)
 {
     def "FiveFace" (
+        assetInfo = {
+            string name = "FiveFace"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/5_face/5_face.usda@
     )
     {}
     def "DoubleSided_Quad" (
+        assetInfo = {
+            string name = "DoubleSided_Quad"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/doubleSided/doubleSided_quad.usda@
     )
     {}
     def "Empty" (
+        assetInfo = {
+            string name = "Empty"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/empty_mesh/empty.usda@
     )
     {}
     def "Mixed" (
+        assetInfo = {
+            string name = "Mixed"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/mixed_faceVertexCounts/mixed.usda@
     )
     {}
     def "NormalsTypes" (
+        assetInfo = {
+            string name = "NormalsTypes"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/normals_types/normalsTypes.usda@
     )
     {}
     def "PointsTypes" (
+        assetInfo = {
+            string name = "PointsTypes"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/points_types/pointsTypes.usda@
     )
     {}
     def "Quads" (
+        assetInfo = {
+            string name = "Quads"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/quad_mesh/quads.usda@
     )
     {}
     def "SingleSided" (
+        assetInfo = {
+            string name = "SingleSided"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/singleSided/singleSided.usda@
     )
     {}
     def "Subdiv_Bilinear" (
+        assetInfo = {
+            string name = "Subdiv_Bilinear"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/subdiv_bilinear/subdiv_bilinear.usda@
     )
     {}
     def "Subdiv_CatmullClark" (
+        assetInfo = {
+            string name = "Subdiv_CatmullClark"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/subdiv_catmullClark/subdiv_catmullClark.usda@
     )
     {}
     def "Subdiv_Loop_Quads" (
+        assetInfo = {
+            string name = "Subdiv_Loop_Quads"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/subdiv_loop_quads/subdiv_loop_quads.usda@
     )
     {}
     def "Subdiv_Loop_Triangles" (
+        assetInfo = {
+            string name = "Subdiv_Loop_Triangles"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/subdiv_loop_triangles/subdiv_loop_triangles.usda@
     )
     {}
     def "Subdiv_None" (
+        assetInfo = {
+            string name = "Subdiv_None"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/subdiv_none/subdiv_none.usda@
     )
     {}
     def "Triangles" (
+        assetInfo = {
+            string name = "Triangles"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/meshes/triangled_mesh/triangles.usda@
     )
     {}
 }
 
 def Scope "Primitives"
+(
+    kind = "group"
+)
 {
     def "All_Primitives" (
+        assetInfo = {
+            string name = "All_Primitives"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/primitives/all_primitives.usda@
     )
     {}
     def "Capsule" (
+        assetInfo = {
+            string name = "Capsule"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/primitives/capsule.usda@
     )
     {}
     def "Cone" (
+        assetInfo = {
+            string name = "Cone"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/primitives/cone.usda@
     )
     {}
     def "Cube" (
+        assetInfo = {
+            string name = "Cube"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/primitives/cube.usda@
     )
     {}
     def "Cylinder" (
+        assetInfo = {
+            string name = "Cylinder"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/primitives/cylinder.usda@
     )
     {}
     def "Sphere" (
+        assetInfo = {
+            string name = "Sphere"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/primitives/sphere.usda@
     )
     {}
@@ -110,32 +233,65 @@ def Scope "Primitives"
 }
 
 def Scope "Transforms"
+(
+    kind = "group"
+)
 {
     def "Complex_Transform" (
+        assetInfo = {
+            string name = "Complex_Transform"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/transforms/complex_transform.usda@
     )
     {}
     def "Matrix_Transform" (
+        assetInfo = {
+            string name = "Matrix_Transform"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/transforms/matrix_transform.usda@
     )
     {}
 
     def "Scopes_And_Xforms_Nested" (
+        assetInfo = {
+            string name = "Scopes_And_Xforms_Nested"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/transforms/scopes_and_xforms_nested.usda@
     )
     {}
 
     def "Simple_Transform" (
+        assetInfo = {
+            string name = "Simple_Transform"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/transforms/simple_transform.usda@
     )
     {}
 
-    def "Weird_MAtrix_Transform" (
+    def "Weird_Matrix_Transform" (
+        assetInfo = {
+            string name = "Weird_Matrix_Transform"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/transforms/weird_matrix_transform.usda@
     )
     {}
 
     def "Xforms_Nested" (
+        assetInfo = {
+            string name = "Xforms_Nested"
+            string version = "1"
+        }
+        kind = "model"
         prepend references = @./usdGeom/transforms/xforms_nested.usda@
     )
     {}