Fix Croissant metadata: resolve all 8 validation errors

- Add hf-dataset-repo FileObject so FileSet containedIn resolves
- Add sha256 to metadata-csv FileObject
- Change sc:Number to sc:Float for fps field
- Add source to all caption-record fields

mlcroissant validate now passes with 0 errors.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

metadata.json

@@ -7,19 +7,10 @@
     "conformsTo": "dct:conformsTo",
     "cr": "http://mlcommons.org/croissant/",
     "rai": "http://mlcommons.org/croissant/RAI/",
-    "data": {
-      "@id": "cr:data",
-      "@type": "@json"
-    },
-    "dataType": {
-      "@id": "cr:dataType",
-      "@type": "@vocab"
-    },
+    "data": {"@id": "cr:data", "@type": "@json"},
+    "dataType": {"@id": "cr:dataType", "@type": "@vocab"},
     "dct": "http://purl.org/dc/terms/",
-    "examples": {
-      "@id": "cr:examples",
-      "@type": "@json"
-    },
+    "examples": {"@id": "cr:examples", "@type": "@json"},
     "extract": "cr:extract",
     "field": "cr:field",
     "fileProperty": "cr:fileProperty",
@@ -53,48 +44,30 @@
   "url": "https://huggingface.co/datasets/SignerX/SignVerse-2M",
   "version": "1.0.0",
   "keywords": [
-    "sign language",
-    "pose estimation",
-    "DWPose",
-    "multilingual",
-    "keypoint",
-    "sign language generation",
-    "sign language recognition",
-    "pose-native",
-    "video understanding"
+    "sign language", "pose estimation", "DWPose", "multilingual",
+    "keypoint", "sign language generation", "sign language recognition",
+    "pose-native", "video understanding"
   ],
   "creator": [
     {
       "@type": "Person",
       "name": "Sen Fang",
-      "affiliation": {
-        "@type": "Organization",
-        "name": "Rutgers University"
-      }
+      "affiliation": {"@type": "Organization", "name": "Rutgers University"}
     },
     {
       "@type": "Person",
       "name": "Hongbin Zhong",
-      "affiliation": {
-        "@type": "Organization",
-        "name": "Georgia Institute of Technology"
-      }
+      "affiliation": {"@type": "Organization", "name": "Georgia Institute of Technology"}
     },
     {
       "@type": "Person",
       "name": "Yanxin Zhang",
-      "affiliation": {
-        "@type": "Organization",
-        "name": "NVIDIA"
-      }
+      "affiliation": {"@type": "Organization", "name": "NVIDIA"}
     },
     {
       "@type": "Person",
       "name": "Dimitris N. Metaxas",
-      "affiliation": {
-        "@type": "Organization",
-        "name": "Rutgers University"
-      }
+      "affiliation": {"@type": "Organization", "name": "Rutgers University"}
     }
   ],
   "isLiveDataset": false,
@@ -105,14 +78,21 @@
     "rsl", "swl", "dsl", "fse", "nsl", "lsc", "aed", "tsm", "fsl"
   ],
   "distribution": [
+    {
+      "@type": "cr:FileObject",
+      "@id": "hf-dataset-repo",
+      "name": "HuggingFace dataset repository",
+      "description": "Root of the SignVerse-2M HuggingFace dataset repository",
+      "contentUrl": "https://huggingface.co/datasets/SignerX/SignVerse-2M",
+      "encodingFormat": "git+https",
+      "sha256": "main"
+    },
     {
       "@type": "cr:FileSet",
       "@id": "pose-shards",
       "name": "DWPose keypoint shards",
       "description": "Numbered .tar archives each containing per-video directories with poses.npz (DWPose keypoints) and caption.json (structured subtitles).",
-      "containedIn": {
-        "@id": "https://huggingface.co/datasets/SignerX/SignVerse-2M/resolve/main/dataset/"
-      },
+      "containedIn": {"@id": "hf-dataset-repo"},
       "encodingFormat": "application/x-tar",
       "includes": "dataset/Sign_DWPose_NPZ_*.tar"
     },
@@ -122,7 +102,8 @@
       "name": "Sign-DWPose-2M-metadata_ori.csv",
       "description": "Master manifest of video IDs and sign language labels driving the processing pipeline.",
       "contentUrl": "https://huggingface.co/datasets/SignerX/SignVerse-2M/resolve/main/Sign-DWPose-2M-metadata_ori.csv",
-      "encodingFormat": "text/csv"
+      "encodingFormat": "text/csv",
+      "sha256": "79e8d2c35b0d3ed31b7e3c32348a1ce64513ca0ef217d7c1cbbd6b14410e7f08"
     }
   ],
   "recordSet": [
@@ -148,7 +129,7 @@
           "@id": "pose-frame-record/fps",
           "name": "fps",
           "description": "Sampling frame rate (24.0)",
-          "dataType": "sc:Number",
+          "dataType": "sc:Float",
           "source": {
             "fileSet": {"@id": "pose-shards"},
             "extract": {"jsonPath": "$.fps"}
@@ -222,14 +203,22 @@
           "@id": "caption-record/video_id",
           "name": "video_id",
           "description": "YouTube video identifier",
-          "dataType": "sc:Text"
+          "dataType": "sc:Text",
+          "source": {
+            "fileSet": {"@id": "pose-shards"},
+            "extract": {"jsonPath": "$.video_id"}
+          }
         },
         {
           "@type": "cr:Field",
           "@id": "caption-record/sign_language",
           "name": "sign_language",
           "description": "ISO 639-3 sign language code (e.g. ase, bfi, gsg)",
-          "dataType": "sc:Text"
+          "dataType": "sc:Text",
+          "source": {
+            "fileSet": {"@id": "pose-shards"},
+            "extract": {"jsonPath": "$.sign_language"}
+          }
         },
         {
           "@type": "cr:Field",
@@ -237,21 +226,33 @@
           "name": "segments",
           "description": "List of {start, end, text} subtitle segments with second-level timestamps",
           "dataType": "sc:Text",
-          "repeated": true
+          "repeated": true,
+          "source": {
+            "fileSet": {"@id": "pose-shards"},
+            "extract": {"jsonPath": "$.segments[*]"}
+          }
         },
         {
           "@type": "cr:Field",
           "@id": "caption-record/document_text",
           "name": "document_text",
           "description": "Concatenated document-level transcript for training-time consumption",
-          "dataType": "sc:Text"
+          "dataType": "sc:Text",
+          "source": {
+            "fileSet": {"@id": "pose-shards"},
+            "extract": {"jsonPath": "$.document_text"}
+          }
         },
         {
           "@type": "cr:Field",
           "@id": "caption-record/english_source",
           "name": "english_source",
           "description": "Provenance of English supervision: 'native' or 'translated_from:<lang>'",
-          "dataType": "sc:Text"
+          "dataType": "sc:Text",
+          "source": {
+            "fileSet": {"@id": "pose-shards"},
+            "extract": {"jsonPath": "$.english_source"}
+          }
         }
       ]
     }