diff --git a/README.md b/README.md
index 9112779..c7cb499 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 <div align="center">
   
 Production Flow Description Language
diff --git a/docs/examples/concurrency_and_synchronization.md b/docs/examples/concurrency_and_synchronization.md
index db37165..71817bb 100644
--- a/docs/examples/concurrency_and_synchronization.md
+++ b/docs/examples/concurrency_and_synchronization.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Concurrency and Synchronization
 
 As already stated in the [parallel](../pfdl/parallel.md) section, there is no keyword for the synchronization. The next statement after a parallel block is only started if all concurrently running tasks are finished.
diff --git a/docs/examples/control_structures.md b/docs/examples/control_structures.md
index a0627fa..14c67b3 100644
--- a/docs/examples/control_structures.md
+++ b/docs/examples/control_structures.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Control structures
 
 ## Condition
diff --git a/docs/examples/introduction.md b/docs/examples/introduction.md
index 7bddf2b..b7c6d7a 100644
--- a/docs/examples/introduction.md
+++ b/docs/examples/introduction.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Introduction
 
 In this section complete PFDL programs are presented to give a better understanding.
diff --git a/docs/examples/task_input_and_output.md b/docs/examples/task_input_and_output.md
index d0b332e..7a509c6 100644
--- a/docs/examples/task_input_and_output.md
+++ b/docs/examples/task_input_and_output.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Task input and output
 
 Tasks can define an Input and an Output to pass data when calling each other.
diff --git a/docs/getting_started/architecture.md b/docs/getting_started/architecture.md
index ee9d9d3..2d932e3 100644
--- a/docs/getting_started/architecture.md
+++ b/docs/getting_started/architecture.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 <style>
 .figure{
     width: 100%;
diff --git a/docs/getting_started/ci_cd.md b/docs/getting_started/ci_cd.md
index 4774ef3..0060158 100644
--- a/docs/getting_started/ci_cd.md
+++ b/docs/getting_started/ci_cd.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 <style>
 .figure{
     width: 80%;
diff --git a/docs/getting_started/glossary.md b/docs/getting_started/glossary.md
index 535a09c..124336d 100644
--- a/docs/getting_started/glossary.md
+++ b/docs/getting_started/glossary.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Glossary
 
 ## Data Life Cycle Object (DLCO)
diff --git a/docs/getting_started/installation.md b/docs/getting_started/installation.md
index 43fd71b..9be2c75 100644
--- a/docs/getting_started/installation.md
+++ b/docs/getting_started/installation.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 <style>
 .figure{
     width: 70%;
diff --git a/docs/index.md b/docs/index.md
index ed1b0a0..1a4cc76 100644
--- a/docs/index.md
+++ b/docs/index.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 ---
 hide:
   - navigation
diff --git a/docs/pfdl/comments.md b/docs/pfdl/comments.md
index 4ba291a..0da37be 100644
--- a/docs/pfdl/comments.md
+++ b/docs/pfdl/comments.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Comments
 
 A comment starts with a hash character (`#`) that is not part of a string literal, and ends at the end of the physical line.
diff --git a/docs/pfdl/condition.md b/docs/pfdl/condition.md
index e39214f..2bb0ca0 100644
--- a/docs/pfdl/condition.md
+++ b/docs/pfdl/condition.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Condition
 Because some production steps needs to fulfill conditions sometimes there is a control structure `Condition` for this specific case.
 The `Condition` block consists of a `Condition` which includes a boolean expression, a `Passed` block in which instructions are given for the case that the boolean expression evaluates to True.
diff --git a/docs/pfdl/introduction.md b/docs/pfdl/introduction.md
index c61e32b..4f59409 100644
--- a/docs/pfdl/introduction.md
+++ b/docs/pfdl/introduction.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 <style>
 .figure_1{
     width: 60%;
diff --git a/docs/pfdl/loop.md b/docs/pfdl/loop.md
index 5dc188b..562babe 100644
--- a/docs/pfdl/loop.md
+++ b/docs/pfdl/loop.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Loop
 To execute statements for a specified number of repetitions, the usage of the `Loop` keyword is required.
 There are two types of loops available: Counting Loops and While Loops.
diff --git a/docs/pfdl/parallel.md b/docs/pfdl/parallel.md
index ac1bbad..15dd6a2 100644
--- a/docs/pfdl/parallel.md
+++ b/docs/pfdl/parallel.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Parallel
 To exexute Tasks in parallel the `Parallel` keyword is used.
 All Tasks within a Parallel block will be executed concurrently by the Scheduler.
diff --git a/docs/pfdl/service.md b/docs/pfdl/service.md
index 93c6229..a806db1 100644
--- a/docs/pfdl/service.md
+++ b/docs/pfdl/service.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Service
 
 A Service in the PFDL corresponds to a service in a service oriented architecture.
diff --git a/docs/pfdl/struct.md b/docs/pfdl/struct.md
index fc8bf9c..f360117 100644
--- a/docs/pfdl/struct.md
+++ b/docs/pfdl/struct.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Structs
 
 A struct is a collection of variables.
diff --git a/docs/pfdl/task.md b/docs/pfdl/task.md
index 0f96fda..3be0026 100644
--- a/docs/pfdl/task.md
+++ b/docs/pfdl/task.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Task
 A Task is an executable unit which executes the statements within sequentially.
 The name of the Task should be a [lowercase string](../#allowed-characters).
diff --git a/docs/scheduler/api.md b/docs/scheduler/api.md
index f906518..130dc0e 100644
--- a/docs/scheduler/api.md
+++ b/docs/scheduler/api.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # PFDL Scheduler API
 
 In this section further information about the functions that can be used from the PFDL Scheduler is given.
diff --git a/docs/scheduler/dashboard.md b/docs/scheduler/dashboard.md
index d0f8e3f..4be6fe3 100644
--- a/docs/scheduler/dashboard.md
+++ b/docs/scheduler/dashboard.md
@@ -1 +1,5 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 <swagger-ui src="../../api_spec/http-rest-api.yml"/>
\ No newline at end of file
diff --git a/docs/scheduler/developer_reference.md b/docs/scheduler/developer_reference.md
index 8184255..5de3004 100644
--- a/docs/scheduler/developer_reference.md
+++ b/docs/scheduler/developer_reference.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Developer Reference
 
 ::: pfdl_scheduler
diff --git a/docs/scheduler/index.md b/docs/scheduler/index.md
index a8c8790..08b3e32 100644
--- a/docs/scheduler/index.md
+++ b/docs/scheduler/index.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Using the PFDL scheduler
 
 This section can be used as a reference while developing software with the PFDL Scheduler.
diff --git a/docs/scheduler/model_classes.md b/docs/scheduler/model_classes.md
index 084ee11..40e6c08 100644
--- a/docs/scheduler/model_classes.md
+++ b/docs/scheduler/model_classes.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # Model classes
 
 This page provides an overview over the model classes which are extracted from the parsed PFDL file. For an overview visit the [architecture section](../getting_started/architecture.md#model-creation-and-validation).
diff --git a/docs/scheduler/scheduler_class.md b/docs/scheduler/scheduler_class.md
index b5b125d..1fc7e4e 100644
--- a/docs/scheduler/scheduler_class.md
+++ b/docs/scheduler/scheduler_class.md
@@ -1,3 +1,7 @@
+<!--
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+-->
 # The Scheduler class
 
 The PFDL scheduler is the interface between the PFDL core (model, petri net) and the outside world. If you want to receive the current state of the Production Order or push it further by sending status updates of the services you can register callback functions and fire events.
diff --git a/docs/stylesheets/extra.css b/docs/stylesheets/extra.css
index 4601fee..09442b7 100644
--- a/docs/stylesheets/extra.css
+++ b/docs/stylesheets/extra.css
@@ -1,3 +1,7 @@
+/*
+SPDX-FileCopyrightText: The PFDL Contributors
+SPDX-License-Identifier: MIT
+*/
 :root > * {
     --md-primary-fg-color:        #1f82c0;
     --md-primary-fg-color--light: #ECB7B7;