diff --git a/crates/db/src/catalog.rs b/crates/db/src/catalog.rs
index 4d8f9bc..e26bbe5 100644
--- a/crates/db/src/catalog.rs
+++ b/crates/db/src/catalog.rs
@@ -351,6 +351,8 @@ async fn validate_field(
             "localized-text object {lang: string}",
         )?,
         FieldType::Integer => require(value.is_i64(), key, "integer")?,
+        // Format/range validation (real date parsing) is deferred to issue #11;
+        // here a date field only requires a string value.
         FieldType::Date => require(value.is_string(), key, "date string")?,
         FieldType::Boolean => require(value.is_boolean(), key, "boolean")?,
         FieldType::Term { vocabulary_id } => {