diff --git a/internal/tagger/apps/gromacs.txt b/internal/tagger/apps/gromacs.txt
new file mode 100644
index 0000000..e69de29
diff --git a/internal/tagger/apps/openfoam.txt b/internal/tagger/apps/openfoam.txt
new file mode 100644
index 0000000..e69de29
diff --git a/internal/tagger/apps/vasp.txt b/internal/tagger/apps/vasp.txt
new file mode 100644
index 0000000..e69de29
diff --git a/internal/tagger/detectApp.go b/internal/tagger/detectApp.go
new file mode 100644
index 0000000..298151b
--- /dev/null
+++ b/internal/tagger/detectApp.go
@@ -0,0 +1,20 @@
+// Copyright (C) 2023 NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package tagger
+
+const tagType = "app"
+
+type appInfo struct {
+	tag     string
+	strings []string
+}
+type AppTagger struct {
+	apps []appInfo
+}
+
+func (t *AppTagger) Register() error {
+
+	return nil
+}
diff --git a/internal/tagger/tagger.go b/internal/tagger/tagger.go
new file mode 100644
index 0000000..52a369b
--- /dev/null
+++ b/internal/tagger/tagger.go
@@ -0,0 +1,17 @@
+// Copyright (C) 2023 NHR@FAU, University Erlangen-Nuremberg.
+// All rights reserved.
+// Use of this source code is governed by a MIT-style
+// license that can be found in the LICENSE file.
+package tagger
+
+import "github.com/ClusterCockpit/cc-backend/pkg/schema"
+
+type Tagger interface {
+	Register() error
+	Match(job *schema.Job)
+}
+
+func Init() error {
+
+	return nil
+}