Add dataset card

README.md

@@ -1,27 +1,59 @@
 ---
-dataset_info:
-  features:
-  - name: fact
-    dtype: string
-  - name: type
-    dtype: string
-  - name: library
-    dtype: string
-  - name: imports
-    list: string
-  - name: filename
-    dtype: string
-  - name: symbolic_name
-    dtype: string
-  splits:
-  - name: train
-    num_bytes: 1791182
-    num_examples: 9572
-  download_size: 256231
-  dataset_size: 1791182
-configs:
-- config_name: default
-  data_files:
-  - split: train
-    path: data/train-*
+license: mit
+tags:
+  - theorem-proving
+  - formal-methods
+  - dafny
+  - verification
+  - imperative-programming
+task_categories:
+  - text-generation
+  - feature-extraction
+language:
+  - en
+size_categories:
+  - 1K<n<10K
 ---
+
+# Dafny
+
+A structured dataset of functions, lemmas, and predicates from **Dafny**, a verification-aware programming language.
+
+## Source
+
+- **Repository:** https://github.com/dafny-lang/dafny
+- **Website:** https://dafny.org
+- **License:** MIT
+
+## Statistics
+
+| Property | Value |
+|----------|-------|
+| **Total Entries** | 9,572 |
+| **Functions** | 4,849 |
+| **Predicates** | 2,468 |
+| **Lemmas** | 2,255 |
+| **Source Files** | 2,155 |
+
+## Schema
+
+| Column | Type | Description |
+|--------|------|-------------|
+| `fact` | string | Declaration signature with specs |
+| `type` | string | "function", "predicate", or "lemma" |
+| `library` | string | Dafny module/directory |
+| `imports` | list[string] | Import statements |
+| `filename` | string | Source .dfy file |
+| `symbolic_name` | string | Declaration name |
+
+## About Dafny
+
+Dafny combines:
+- Imperative programming (methods, loops)
+- Functional programming (functions)
+- Built-in verification (preconditions, postconditions, loop invariants)
+- SMT-based automated proving (Z3)
+
+## Creator
+
+Charles Norton ([phanerozoic](https://huggingface.co/phanerozoic))