diff --git a/src/main/java/eu/europa/ted/eforms/sdk/SdkConstants.java b/src/main/java/eu/europa/ted/eforms/sdk/SdkConstants.java
index 25ecad1..707972f 100644
--- a/src/main/java/eu/europa/ted/eforms/sdk/SdkConstants.java
+++ b/src/main/java/eu/europa/ted/eforms/sdk/SdkConstants.java
@@ -19,50 +19,76 @@ public class SdkConstants {
   public static final String SDK_GROUP_ID = "eu.europa.ted.eforms";
   public static final String SDK_ARTIFACT_ID = "eforms-sdk";
   public static final String SDK_PACKAGING = "jar";
+  
+  /**
+   * Forward folder of SDK2+, it can exist in some folders.
+   */
+  public static final String FWD = "fwd"; 
 
   private SdkConstants() {}
 
   public enum SdkResource implements PathResource {
-    CODELISTS(Path.of("codelists")), //
-    CODELISTS_JSON(Path.of("codelists", "codelists.json")), //
+    CODELISTS(Path.of("codelists")),
+    CODELISTS_JSON(Path.of("codelists", "codelists.json")),
+
+    EFX_GRAMMAR(Path.of("efx-grammar")),
+
+    FIELDS(Path.of("fields")),
+    FIELDS_JSON(Path.of("fields", "fields.json")),
+    
+    // FIELDS FWD FOLDER.
+    BUSINESS_ENTITIES_COMPOSITION(Path.of("fields", FWD, "business-entities-composition.json")),
+    BUSINESS_ENTITIES_HIERARCHY(Path.of("fields", FWD, "business-entities-hierarchies.json")),
+    BUSINESS_ENTITIES_PROPERTIES(Path.of("fields", FWD, "business-entities-properties.json")),
+    BUSINESS_TERMS(Path.of("fields", FWD, "business-terms.json")),
+    DATA_TYPES(Path.of("fields", FWD, "data-types.json")),
+    FIELDS_JSON_LIST(Path.of("fields", FWD, "fields.json")),
+    NODES_JSON_LIST(Path.of("fields", FWD, "nodes.json")),
 
-    EFX_GRAMMAR(Path.of("efx-grammar")), //
-
-    FIELDS(Path.of("fields")), //
-    FIELDS_JSON(Path.of("fields", "fields.json")), //
+    /**
+     * Related to asset migration.
+     */
+    MIGRATION(Path.of("migration")),
+    MIGRATION_JSON(Path.of("migration", "migration.json")),
 
-    NOTICE_TYPES(Path.of("notice-types")), //
-    NOTICE_TYPES_JSON(Path.of("notice-types", "notice-types.json")), //
+    NOTICE_TYPES(Path.of("notice-types")),
+    NOTICE_TYPES_JSON(Path.of("notice-types", "notice-types.json")),
 
     /**
-     * XSD files.
+     * Schema files.
      */
-    SCHEMAS(Path.of("schemas")), //
-    SCHEMAS_COMMON(Path.of("schemas", "common")), //
-    SCHEMAS_MAINDOC(Path.of("schemas", "maindoc")), //
+    SCHEMAS(Path.of("schemas")),
+    SCHEMAS_JSON(Path.of("schemas", "schemas.json")),
 
-    SCHEMATRONS(Path.of("schematrons")), //
-    SCHEMATRONS_DYNAMIC(Path.of("schematrons", "dynamic")), //
-    SCHEMATRONS_STATIC(Path.of("schematrons", "static")), //
+    SCHEMAS_COMMON(Path.of("schemas", "common")),
+    SCHEMAS_MAINDOC(Path.of("schemas", "maindoc")),
+
+    SCHEMATRONS(Path.of("schematrons")),
+    SCHEMATRONS_DYNAMIC(Path.of("schematrons", "dynamic")),
+    SCHEMATRONS_STATIC(Path.of("schematrons", "static")),
 
     /**
      * Internal usage, tedweb.
      */
-    TED(Path.of(".ted")), //
-    TED_TEDWEB(Path.of(".ted", "tedweb")), //
-    TED_TEDWEB_REPORT_METADATA(Path.of(".ted", "tedweb", "report-metadata.json")), //
-    TED_TEDWEB_SEARCH_METADATA(Path.of(".ted", "tedweb", "search-metadata.json")), //
+    TED(Path.of(".ted")),
+    TED_TEDWEB(Path.of(".ted", "tedweb")),
+    TED_TEDWEB_REPORT_METADATA(Path.of(".ted", "tedweb", "report-metadata.json")),
+    TED_TEDWEB_SEARCH_METADATA(Path.of(".ted", "tedweb", "search-metadata.json")),
 
     /**
      * Internationalisation, labels.
      */
-    TRANSLATIONS(Path.of("translations")), //
+    TRANSLATIONS(Path.of("translations")),
+    
     /**
      * The index file for translations, only present in SDK 1.10.0 and later.
      */
-    TRANSLATIONS_JSON(Path.of("translations", "translations.json")), //
+    TRANSLATIONS_JSON(Path.of("translations", "translations.json")),
+
+    VALIDATION(Path.of("validation")),
+    VALIDATION_RULES_EFX(Path.of("validation", "rules.efx")),
 
-    VIEW_TEMPLATES(Path.of("view-templates")), //
+    VIEW_TEMPLATES(Path.of("view-templates")),
     VIEW_TEMPLATES_JSON(Path.of("view-templates", "view-templates.json"));
 
     private Path path;