diff --git a/data/funpdbe_schema.json b/data/funpdbe_schema.json
index 838ccbc..0c01318 100644
--- a/data/funpdbe_schema.json
+++ b/data/funpdbe_schema.json
@@ -20,6 +20,14 @@
       "type": "string",
       "description": "URL linking to the entry at the partner resource"
     },
+    "model_coordinates_url": {
+      "type": "string",
+      "description": "URL linking to a structural model at the partner resource"
+    },
+    "includes_het_groups": {
+      "type": "boolean",
+      "description": "Does this JSON include annotations of HET residues"
+    },
     "release_date": {
       "type": "string",
       "description": "Release date of the annotation",
@@ -56,7 +64,7 @@
               "properties": {
                 "pdb_res_label": {
                   "type": "string",
-                  "description": "Residue index from the related PDB entry"
+                  "description": "Author residue index from the corresponding PDB entry (a.k.a. auth_seq_id)"
                 },
                 "aa_type": {
                   "type": "string",