diff --git a/lib/xos-genx/xosgenx/xos2jinja.py b/lib/xos-genx/xosgenx/xos2jinja.py
index e4ff7db..c61bf55 100644
--- a/lib/xos-genx/xosgenx/xos2jinja.py
+++ b/lib/xos-genx/xosgenx/xos2jinja.py
@@ -267,6 +267,7 @@
         except BaseException:
             pass
         s["_type"] = "field"
+        s["_linespan"] = obj.linespan
 
         self.stack.push(s)
         return True
@@ -327,6 +328,7 @@
             "package": self.package,
             "fqn": model_name,
             "rlinks": [],
+            "_linespan": obj.linespan,       # first and last line number
         }
         try:
             model_def["policy"] = obj.policy.pval