diff --git a/data/io/InputDataInfo.cxx b/data/io/InputDataInfo.cxx
index 34af99f..c512a82 100644
--- a/data/io/InputDataInfo.cxx
+++ b/data/io/InputDataInfo.cxx
@@ -28,10 +28,10 @@ namespace Hal {
 
 
   InputDataInfo::InputDataInfo(TString file) : fListName(file) {
-    if (file.EndsWith(".list")) {
+    if (file.EndsWith(".list")) {  // list file
       auto vec = Hal::Std::GetLinesFromFile(file, kTRUE);
       fFileNames.push_back(vec);
-    } else if (file.EndsWith(".xml")) {
+    } else if (file.EndsWith(".xml")) {  // xml file
       XMLFile xmlFile(file);
       auto root  = xmlFile.GetRootNode();
       auto files = root->GetChild("files");
@@ -42,6 +42,12 @@ namespace Hal {
           fFileNames[i].push_back(list->GetChild(j)->GetValue());
         }
       }
+    } else if (file.EndsWith("/")) {  // directory
+      auto vec = Hal::Std::GetListOfFiles(file, "root", kTRUE, kTRUE);
+      for (auto singleFile : vec) {
+        std::vector<TString> row {singleFile};
+        fFileNames.push_back(row);
+      }
     } else {
       fFileNames.resize(1);
       fFileNames[0].push_back(file);
diff --git a/data/io/TriggerTask.h b/data/io/TriggerTask.h
index 90d6aff..e32512e 100644
--- a/data/io/TriggerTask.h
+++ b/data/io/TriggerTask.h
@@ -11,11 +11,13 @@
 
 #include "Task.h"
 
-/**
- * special class for fast data selection - works only with AnalysisManager
- */
+
 namespace Hal {
   class Package;
+  /**
+   * special class for fast data selection - works only with AnalysisManager
+   * when trigger task return false the branches with status 0 are ignored, other tasks are not executed
+   */
   class TriggerTask : public Task {
     Bool_t fGood   = {kFALSE};
     Bool_t fActive = {kFALSE};