diff --git a/src/controllers/file.controller.ts b/src/controllers/file.controller.ts
index f7210c6..25113c8 100644
--- a/src/controllers/file.controller.ts
+++ b/src/controllers/file.controller.ts
@@ -20,7 +20,7 @@ export class FileController {
             const ext = path.extname(filePath);
             const fileName = file.label + ext;
             try {
-                fs.accessSync(filePath, fs.constants.R_OK | fs.constants.W_OK);
+                fs.accessSync(filePath, fs.constants.R_OK); //| fs.constants.W_OK);
                 // console.log("can read/write:", path);
                 res.set({
                     "Cache-Control": "no-cache private",
diff --git a/src/controllers/oai.controller.ts b/src/controllers/oai.controller.ts
index 6d90ef5..76e936e 100644
--- a/src/controllers/oai.controller.ts
+++ b/src/controllers/oai.controller.ts
@@ -228,6 +228,7 @@ export class OaiController {
 
         const sets: { [key: string]: string } = {
             open_access: "Set for open access licenses",
+            "doc-type:ResearchData": "Set for document type ResearchData",
             // 'bibliography:true' => 'Set for bibliographic entries',
             // 'bibliography:false' => 'Set for non-bibliographic entries',
             ...(await this.getSetsForDatasetTypes()),