diff --git a/examples/input.json b/examples/input.json
index c5ac471..b6be293 100644
--- a/examples/input.json
+++ b/examples/input.json
@@ -1,8 +1,10 @@
 {
   "client_name": "Acme Ltd",
-  "provider_name": "John Doe 2",
+  "provider_name": "Will Smith",
   "payment_type": "hourly",
   "hourly_rate_gbp": 40,
   "include_confidentiality": false,
+  "include_ip_clause": false,
+  "termination_notice_days": 14,
   "governing_law": "England and Wales"
 }
\ No newline at end of file
diff --git a/main.py b/main.py
index 834745f..f7a61a4 100644
--- a/main.py
+++ b/main.py
@@ -2,12 +2,17 @@ import json
 from pathlib import Path
 from jinja2 import Environment, FileSystemLoader
 
+from schema import DocumentInput
+
 
 def main():
     # load input data
     # path() over hardcoding str
     data = json.loads(Path("examples/input.json").read_text(encoding="utf-8"))
 
+    # validate + normalise input
+    doc_input = DocumentInput(**data)
+
     # setup template eng
     # create jinja2 env for templates
     env = Environment(
@@ -20,7 +25,7 @@ def main():
     # load template to render
     # **data spreads dict so keys become template vars
     template = env.get_template("doc.md.j2")
-    out = template.render(**data)
+    out = template.render(**doc_input.model_dump())
 
     # write output - render md to file
     Path("out.md").write_text(out, encoding="utf-8")
diff --git a/schema.py b/schema.py
new file mode 100644
index 0000000..04451f5
--- /dev/null
+++ b/schema.py
@@ -0,0 +1,16 @@
+from typing import Literal, Optional
+
+from pydantic import BaseModel, Field
+
+
+class DocumentInput(BaseModel):
+    client_name: str = Field(..., min_length=1)
+    provider_name: str = Field(..., min_length=1)
+
+    payment_type: Literal["hourly", "fixed", "other"]
+
+    hourly_rate_gbp: Optional[float] = Field(None, gt=0)
+    fixed_fee_gbp: Optional[float] = Field(None, gt=0)
+
+    include_confidentiality: bool = False
+    governing_law: str
\ No newline at end of file
diff --git a/templates/doc.md.j2 b/templates/doc.md.j2
index a72a3e0..2fb18c5 100644
--- a/templates/doc.md.j2
+++ b/templates/doc.md.j2
@@ -24,4 +24,14 @@ not included.
 laws of england and wales.
 {% else %}
 {{ governing_law }}.
-{% endif %}
\ No newline at end of file
+{% endif %}
+
+## intellectual property
+{% if include_ip_clause %}
+all intellectual property created during the services remains with the provider.
+{% else %}
+no intellectual property clause is included.
+{% endif %}
+
+## termination
+either party may terminate this agreement with {{ termination_notice_days }} days' written notice.