add caard metadata

README.md

@@ -1,3 +1,38 @@
+---
+language:
+- en
+license: mit
+tags:
+- knowledge-graph
+- rdf
+- owl
+- ontology
+- cybersecurity
+annotations_creators:
+- crowdsourced
+- expert-generated
+pretty_name: D3FEND
+size_categories:
+- 100K<n<1M
+task_categories:
+- graph-ml
+dataset_info:
+  features:
+    - name: subject
+      dtype: string
+    - name: predicate
+      dtype: string
+    - name: object
+      dtype: string
+  config_name: default
+  splits:
+    - name: train
+      num_bytes: 46899451
+      num_examples: 231842
+  dataset_size: 46899451
+viewer: false
+---
+
 # D3FEND 
 
 Branch: https://github.com/d3fend/d3fend-ontology/tree/release/0.13.0-BETA-1