diff --git a/file-formats/ddls/README.md b/file-formats/ddls/README.md
index 620b726f5..c949cef4a 100644
--- a/file-formats/ddls/README.md
+++ b/file-formats/ddls/README.md
@@ -1,8 +1,8 @@
-# DDLS File Format
-
-
-File | Cardinality | Definition | Schema | Example
-:--- | :---  | :--- | :--- | :---
-`<name>.ddls.json` | 1 | [`zif_aff_ddls_v1.intf.abap`](./type/zif_aff_ddls_v1.intf.abap) | [`ddls-v1.json`](./ddls-v1.json) | [`z_aff_example_ddls.ddls.json`](./examples/z_aff_example_ddls.ddls.json)
-`<name>.ddls.cds` | 1 | [CDS](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abencds.htm) | | [`z_aff_example_ddls.ddls.cds`](./examples/z_aff_example_ddls.ddls.cds)
-`<name>.ddls.objectdependencies.json` | 1 | | | [`z_aff_example_ddls.ddls.objectdependencies.json`](./examples/z_aff_example_ddls.ddls.objectdependencies.json)
+# DDLS File Format
+
+
+File | Cardinality | Definition | Schema | Example
+:--- | :---  | :--- | :--- | :---
+`<name>.ddls.json` | 1 | [`zif_aff_ddls_v1.intf.abap`](./type/zif_aff_ddls_v1.intf.abap) | [`ddls-v1.json`](./ddls-v1.json) | [`z_aff_example_ddls.ddls.json`](./examples/z_aff_example_ddls.ddls.json)
+`<name>.ddls.cds` | 1 | [CDS](https://help.sap.com/doc/abapdocu_cp_index_htm/CLOUD/en-US/index.htm?file=abencds.htm) | | [`z_aff_example_ddls.ddls.cds`](./examples/z_aff_example_ddls.ddls.cds)
+`<name>.ddls.objectdependencies.json` | 1 | | | [`z_aff_example_ddls.ddls.objectdependencies.json`](./examples/z_aff_example_ddls.ddls.objectdependencies.json)
\ No newline at end of file
diff --git a/file-formats/ddlx/type/zif_aff_ddlx_v1.intf.abap b/file-formats/ddlx/type/zif_aff_ddlx_v1.intf.abap
index bc8b40efd..fd05fda11 100644
--- a/file-formats/ddlx/type/zif_aff_ddlx_v1.intf.abap
+++ b/file-formats/ddlx/type/zif_aff_ddlx_v1.intf.abap
@@ -1,16 +1,16 @@
-interface zif_aff_ddlx_v1
-  public.
+INTERFACE zif_aff_ddlx_v1
+  PUBLIC.
 
-  types:
+  TYPES:
     "! <p class="shorttext">Object Type DDLX</p>
     "! DDLX object type
-    begin of ty_main,
+    BEGIN OF ty_main,
       "! $required
-      format_version type zif_aff_types_v1=>ty_format_version,
+      format_version TYPE zif_aff_types_v1=>ty_format_version,
       "! <p class="shorttext">Header</p>
       "! Header
       "! $required
-      header         type zif_aff_types_v1=>ty_header_60,
-    end of ty_main.
+      header         TYPE zif_aff_types_v1=>ty_header_60,
+    END OF ty_main.
 
-endinterface.
+ENDINTERFACE.