diff --git a/modeling-cmds/openapi/api.json b/modeling-cmds/openapi/api.json
index a346ee1b..1db50248 100644
--- a/modeling-cmds/openapi/api.json
+++ b/modeling-cmds/openapi/api.json
@@ -8804,6 +8804,15 @@
                   }
                 ]
               },
+              "schema": {
+                "description": "STEP application protocol schema. Defaults to AP242.",
+                "default": "ap242",
+                "allOf": [
+                  {
+                    "$ref": "#/components/schemas/StepSchema"
+                  }
+                ]
+              },
               "type": {
                 "type": "string",
                 "enum": [
@@ -9807,6 +9816,32 @@
           }
         ]
       },
+      "StepSchema": {
+        "description": "Specifies the STEP application protocol schema for export.",
+        "oneOf": [
+          {
+            "description": "AP203 edition 2.",
+            "type": "string",
+            "enum": [
+              "ap203"
+            ]
+          },
+          {
+            "description": "AP214.",
+            "type": "string",
+            "enum": [
+              "ap214"
+            ]
+          },
+          {
+            "description": "AP242.\n\nThis is the default setting.",
+            "type": "string",
+            "enum": [
+              "ap242"
+            ]
+          }
+        ]
+      },
       "StlStorage": {
         "description": "Export storage.",
         "oneOf": [
diff --git a/modeling-cmds/src/format/mod.rs b/modeling-cmds/src/format/mod.rs
index db3d575c..21fcec7d 100644
--- a/modeling-cmds/src/format/mod.rs
+++ b/modeling-cmds/src/format/mod.rs
@@ -362,6 +362,7 @@ impl OutputFormat3d {
                 created: None,
                 units: src_unit,
                 presentation: step::export::Presentation::Pretty,
+                ..Default::default()
             }),
             FileExportFormat::Stl => Self::Stl(stl::export::Options {
                 storage: stl::export::Storage::Ascii,
diff --git a/modeling-cmds/src/format/step.rs b/modeling-cmds/src/format/step.rs
index c0804c14..d642ebe5 100644
--- a/modeling-cmds/src/format/step.rs
+++ b/modeling-cmds/src/format/step.rs
@@ -89,6 +89,35 @@ pub mod export {
     use super::*;
     use crate::units::UnitLength;
 
+    /// Specifies the STEP application protocol schema for export.
+    #[derive(
+        Default, Clone, Copy, Debug, Eq, Hash, PartialEq, Serialize, Deserialize, JsonSchema, Display, FromStr,
+    )]
+    #[display(style = "snake_case")]
+    #[serde(rename = "StepSchema", rename_all = "snake_case")]
+    #[cfg_attr(feature = "arbitrary", derive(arbitrary::Arbitrary))]
+    #[cfg_attr(feature = "ts-rs", derive(ts_rs::TS))]
+    #[cfg_attr(feature = "ts-rs", ts(export_to = "ModelingCmd.ts"))]
+    #[cfg_attr(
+        feature = "python",
+        pyo3_stub_gen::derive::gen_stub_pyclass_enum,
+        pyo3::pyclass(name = "StepSchema", from_py_object)
+    )]
+    #[cfg_attr(not(feature = "unstable_exhaustive"), non_exhaustive)]
+    pub enum Schema {
+        /// AP203 edition 2.
+        Ap203,
+
+        /// AP214.
+        Ap214,
+
+        /// AP242.
+        ///
+        /// This is the default setting.
+        #[default]
+        Ap242,
+    }
+
     /// Describes the presentation style of the EXPRESS exchange format.
     #[derive(
         Default, Clone, Copy, Debug, Eq, Hash, PartialEq, Serialize, Deserialize, JsonSchema, Display, FromStr,
@@ -148,6 +177,10 @@ pub mod export {
         /// Presentation style.
         #[builder(default = default_presentation())]
         pub presentation: Presentation,
+
+        /// STEP application protocol schema. Defaults to AP242.
+        #[builder(default)]
+        pub schema: Schema,
     }
 
     #[cfg(feature = "python")]
@@ -168,6 +201,7 @@ pub mod export {
                 created: None,
                 units: default_units(),
                 presentation: default_presentation(),
+                schema: Schema::default(),
             }
         }
     }