diff --git a/.coveragerc b/.coveragerc
new file mode 100644
index 0000000000000000000000000000000000000000..096ae14ebab27380feedb28bf923c29e112ab4ec
--- /dev/null
+++ b/.coveragerc
@@ -0,0 +1,4 @@
+[run]
+omit = 
+    *example.py
+    */usr/*
diff --git a/.gitignore b/.gitignore
index 11614af2870733183efe883810764d8708bddf8f..e01aca0bfc95772299812615a69de3808b12ba9a 100644
--- a/.gitignore
+++ b/.gitignore
@@ -90,7 +90,7 @@ celerybeat-schedule
 # Environments
 .env
 .venv
-env/
+env*/
 venv/
 ENV/
 env.bak/
diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
new file mode 100644
index 0000000000000000000000000000000000000000..27b46ba817eb967e1f15d6cf89969048cf57f75e
--- /dev/null
+++ b/.gitlab-ci.yml
@@ -0,0 +1,84 @@
+# This file is a template, and might need editing before it works on your project.
+# To contribute improvements to CI/CD templates, please follow the Development guide at:
+# https://docs.gitlab.com/ee/development/cicd/templates.html
+# This specific template is located at:
+# https://gitlab.com/gitlab-org/gitlab/-/blob/master/lib/gitlab/ci/templates/Python.gitlab-ci.yml
+
+# Official language image. Look for the different tagged releases at:
+# https://hub.docker.com/r/library/python/tags/
+image: python:latest
+
+stages:
+  - linting
+  - testing
+
+# Change pip's cache directory to be inside the project directory since we can
+# only cache local items.
+variables:
+  PIP_CACHE_DIR: "$CI_PROJECT_DIR/.cache/pip"
+
+# Pip's cache doesn't store the python packages
+# https://pip.pypa.io/en/stable/reference/pip_install/#caching
+#
+# If you want to also cache the installed packages, you have to install
+# them in a virtualenv and cache it as well.
+cache:
+  paths:
+#    - .cache/pip  # 
+#    - venv/   #
+
+
+
+  
+before_script:
+  - python --version  # For debugging
+  - pip install -r requirements.txt  # install dependencies from file
+  - pip install flake8
+  - pip install pylint
+#  - pip install virtualenv
+#  - virtualenv venv
+#  - source venv/bin/activate
+
+PEP8:
+  stage: linting
+  # allow_failure: true
+  script: flake8 --count . # PEP8 linting
+
+
+Pylint:
+  stage: linting
+  # allow_failure: true
+  script: find . -type f -name '*.py' | xargs pylint -rn --rcfile='plotid/.pylintrc' # Find all python files and check the code with pylint.
+
+test:
+  stage: testing
+  tags: 
+    - docker
+  script:
+#     - python -m unittest discover -s ./tests/ -p "test*" # deprecated unittest command
+      - python tests/runner_tests.py
+#    - pip install tox flake8  # you can also use tox
+#    - tox -e py36,flake8
+
+# Commenting out all other stages and jobs
+#run:
+#  script:
+#    - python setup.py bdist_wheel
+#    # an alternative approach is to install and run:
+#    - pip install dist/*
+#    # run the command here
+#  artifacts:
+#    paths:
+#      - dist/*.whl
+
+#pages:
+#  script:
+#    - pip install sphinx sphinx-rtd-theme
+#    - cd doc
+#    - make html
+#    - mv build/html/ ../public/
+#  artifacts:
+#    paths:
+#      - public
+#  rules:
+#    - if: $CI_COMMIT_BRANCH == $CI_DEFAULT_BRANCH
diff --git a/HDF5_externalLink.py b/HDF5_externalLink.py
deleted file mode 100644
index 40fa5fa3fbdcb47dfd9578e5e4f3145cc6ae6285..0000000000000000000000000000000000000000
--- a/HDF5_externalLink.py
+++ /dev/null
@@ -1,9 +0,0 @@
-import h5py 
-
-#Shows how to create an externalLink (symbolic) to a hdf5 File
-#Documentation available at: https://docs.h5py.org/en/stable/high/group.html#external-links
-myfile = h5py.File('./example.h5','w')
-myfile['ext link'] = h5py.ExternalLink("testdata_2.h5", "/")
-
-myfile.close()
-
diff --git a/LICENSE b/LICENSE
new file mode 100644
index 0000000000000000000000000000000000000000..69a3786913abc56d373be8f9b431b79aa3e33639
--- /dev/null
+++ b/LICENSE
@@ -0,0 +1,201 @@
+                                 Apache License
+                           Version 2.0, January 2004
+                        http://www.apache.org/licenses/
+
+   TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION
+
+   1. Definitions.
+
+      "License" shall mean the terms and conditions for use, reproduction,
+      and distribution as defined by Sections 1 through 9 of this document.
+
+      "Licensor" shall mean the copyright owner or entity authorized by
+      the copyright owner that is granting the License.
+
+      "Legal Entity" shall mean the union of the acting entity and all
+      other entities that control, are controlled by, or are under common
+      control with that entity. For the purposes of this definition,
+      "control" means (i) the power, direct or indirect, to cause the
+      direction or management of such entity, whether by contract or
+      otherwise, or (ii) ownership of fifty percent (50%) or more of the
+      outstanding shares, or (iii) beneficial ownership of such entity.
+
+      "You" (or "Your") shall mean an individual or Legal Entity
+      exercising permissions granted by this License.
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+      including but not limited to software source code, documentation
+      source, and configuration files.
+
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+      transformation or translation of a Source form, including but
+      not limited to compiled object code, generated documentation,
+      and conversions to other media types.
+
+      "Work" shall mean the work of authorship, whether in Source or
+      Object form, made available under the License, as indicated by a
+      copyright notice that is included in or attached to the work
+      (an example is provided in the Appendix below).
+
+      "Derivative Works" shall mean any work, whether in Source or Object
+      form, that is based on (or derived from) the Work and for which the
+      editorial revisions, annotations, elaborations, or other modifications
+      represent, as a whole, an original work of authorship. For the purposes
+      of this License, Derivative Works shall not include works that remain
+      separable from, or merely link (or bind by name) to the interfaces of,
+      the Work and Derivative Works thereof.
+
+      "Contribution" shall mean any work of authorship, including
+      the original version of the Work and any modifications or additions
+      to that Work or Derivative Works thereof, that is intentionally
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+      communication on electronic mailing lists, source code control systems,
+      and issue tracking systems that are managed by, or on behalf of, the
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+      excluding communication that is conspicuously marked or otherwise
+      designated in writing by the copyright owner as "Not a Contribution."
+
+      "Contributor" shall mean Licensor and any individual or Legal Entity
+      on behalf of whom a Contribution has been received by Licensor and
+      subsequently incorporated within the Work.
+
+   2. Grant of Copyright License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      copyright license to reproduce, prepare Derivative Works of,
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+      Work and such Derivative Works in Source or Object form.
+
+   3. Grant of Patent License. Subject to the terms and conditions of
+      this License, each Contributor hereby grants to You a perpetual,
+      worldwide, non-exclusive, no-charge, royalty-free, irrevocable
+      (except as stated in this section) patent license to make, have made,
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+      where such license applies only to those patent claims licensable
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+      institute patent litigation against any entity (including a
+      cross-claim or counterclaim in a lawsuit) alleging that the Work
+      or a Contribution incorporated within the Work constitutes direct
+      or contributory patent infringement, then any patent licenses
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+      as of the date such litigation is filed.
+
+   4. Redistribution. You may reproduce and distribute copies of the
+      Work or Derivative Works thereof in any medium, with or without
+      modifications, and in Source or Object form, provided that You
+      meet the following conditions:
+
+      (a) You must give any other recipients of the Work or
+          Derivative Works a copy of this License; and
+
+      (b) You must cause any modified files to carry prominent notices
+          stating that You changed the files; and
+
+      (c) You must retain, in the Source form of any Derivative Works
+          that You distribute, all copyright, patent, trademark, and
+          attribution notices from the Source form of the Work,
+          excluding those notices that do not pertain to any part of
+          the Derivative Works; and
+
+      (d) If the Work includes a "NOTICE" text file as part of its
+          distribution, then any Derivative Works that You distribute must
+          include a readable copy of the attribution notices contained
+          within such NOTICE file, excluding those notices that do not
+          pertain to any part of the Derivative Works, in at least one
+          of the following places: within a NOTICE text file distributed
+          as part of the Derivative Works; within the Source form or
+          documentation, if provided along with the Derivative Works; or,
+          within a display generated by the Derivative Works, if and
+          wherever such third-party notices normally appear. The contents
+          of the NOTICE file are for informational purposes only and
+          do not modify the License. You may add Your own attribution
+          notices within Derivative Works that You distribute, alongside
+          or as an addendum to the NOTICE text from the Work, provided
+          that such additional attribution notices cannot be construed
+          as modifying the License.
+
+      You may add Your own copyright statement to Your modifications and
+      may provide additional or different license terms and conditions
+      for use, reproduction, or distribution of Your modifications, or
+      for any such Derivative Works as a whole, provided Your use,
+      reproduction, and distribution of the Work otherwise complies with
+      the conditions stated in this License.
+
+   5. Submission of Contributions. Unless You explicitly state otherwise,
+      any Contribution intentionally submitted for inclusion in the Work
+      by You to the Licensor shall be under the terms and conditions of
+      this License, without any additional terms or conditions.
+      Notwithstanding the above, nothing herein shall supersede or modify
+      the terms of any separate license agreement you may have executed
+      with Licensor regarding such Contributions.
+
+   6. Trademarks. This License does not grant permission to use the trade
+      names, trademarks, service marks, or product names of the Licensor,
+      except as required for reasonable and customary use in describing the
+      origin of the Work and reproducing the content of the NOTICE file.
+
+   7. Disclaimer of Warranty. Unless required by applicable law or
+      agreed to in writing, Licensor provides the Work (and each
+      Contributor provides its Contributions) on an "AS IS" BASIS,
+      WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
+      implied, including, without limitation, any warranties or conditions
+      of TITLE, NON-INFRINGEMENT, MERCHANTABILITY, or FITNESS FOR A
+      PARTICULAR PURPOSE. You are solely responsible for determining the
+      appropriateness of using or redistributing the Work and assume any
+      risks associated with Your exercise of permissions under this License.
+
+   8. Limitation of Liability. In no event and under no legal theory,
+      whether in tort (including negligence), contract, or otherwise,
+      unless required by applicable law (such as deliberate and grossly
+      negligent acts) or agreed to in writing, shall any Contributor be
+      liable to You for damages, including any direct, indirect, special,
+      incidental, or consequential damages of any character arising as a
+      result of this License or out of the use or inability to use the
+      Work (including but not limited to damages for loss of goodwill,
+      work stoppage, computer failure or malfunction, or any and all
+      other commercial damages or losses), even if such Contributor
+      has been advised of the possibility of such damages.
+
+   9. Accepting Warranty or Additional Liability. While redistributing
+      the Work or Derivative Works thereof, You may choose to offer,
+      and charge a fee for, acceptance of support, warranty, indemnity,
+      or other liability obligations and/or rights consistent with this
+      License. However, in accepting such obligations, You may act only
+      on Your own behalf and on Your sole responsibility, not on behalf
+      of any other Contributor, and only if You agree to indemnify,
+      defend, and hold each Contributor harmless for any liability
+      incurred by, or claims asserted against, such Contributor by reason
+      of your accepting any such warranty or additional liability.
+
+   END OF TERMS AND CONDITIONS
+
+   APPENDIX: How to apply the Apache License to your work.
+
+      To apply the Apache License to your work, attach the following
+      boilerplate notice, with the fields enclosed by brackets "[]"
+      replaced with your own identifying information. (Don't include
+      the brackets!)  The text should be enclosed in the appropriate
+      comment syntax for the file format. We also recommend that a
+      file or class name and description of purpose be included on the
+      same "printed page" as the copyright notice for easier
+      identification within third-party archives.
+
+   Copyright 2022 PlotID
+
+   Licensed under the Apache License, Version 2.0 (the "License");
+   you may not use this file except in compliance with the License.
+   You may obtain a copy of the License at
+
+       http://www.apache.org/licenses/LICENSE-2.0
+
+   Unless required by applicable law or agreed to in writing, software
+   distributed under the License is distributed on an "AS IS" BASIS,
+   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+   See the License for the specific language governing permissions and
+   limitations under the License.
diff --git a/README.md b/README.md
index 58de42ddc60a1be7d4c653ab83c188a1a4a3d723..8d481de3ce3336fb936684ef9f5748d771bc4c36 100644
--- a/README.md
+++ b/README.md
@@ -1,3 +1,107 @@
-# plot_ID_python
+# PlotID for Python
 
-This is the python PlotID project
\ No newline at end of file
+This is the python PlotID project.  
+PlotID is a program connected to Research Data Management (RDM). It has two main functionalities:
+1. Tag your plot with an identifier.
+2. Export the resulting file to a specified directory along the corresponding research data, the plot is based on. Additionally, the script that created the plot will also be copied to the directory.
+
+**Note:** To run PlotID python version ≥ 3.10 is required.
+
+## Installation
+Currently there are two options to run PlotID. Either install it via pip from the Python Package Index (PyPi) or install PlotID from the source code.
+
+### From PyPi with pip
+1. [Optional] Create a virtual environment and activate it:  
+```bash
+pip install venv
+mkdir venv  
+python3 -m venv
+source venv/bin/activate
+```
+2. Install PlotID  
+`pip install --upgrade --index-url https://test.pypi.org/simple/ example-package-plotid-test`
+
+### From source
+1. Download the source code from [Gitlab](https://git.rwth-aachen.de/plotid/plotid_python):  
+`git clone https://git.rwth-aachen.de/plotid/plotid_python.git`  
+`cd plotid_python`  
+2. [Optional] Create a virtual environment:  
+```bash
+pip install venv
+mkdir venv  
+python3 -m venv
+source venv/bin/activate
+```
+3. Install dependencies  
+`pip install -r requirements.txt`  
+4. Install PlotID  
+`pip install .`  
+
+## Usage
+PlotID has two main functionalities:
+1. Tag your plot with an identifier.
+2. Export the resulting file to a specified directory along the corresponding research data, the plot is based on. Additionally, the script that created the plot will also be copied to the directory.
+
+### tagplot()
+Tag your figure/plot with an ID.  
+`tagplot(figures, plot_engine)`  
+The variable "figures" can be a single figure or a list of multiple figures.  
+The argument "plot_engine" defines which plot engine was used to create the figures. It also determines which plot engine PlotID uses to place the ID on the plot. Currently supported plot engines are:
+- 'matplotlib'
+
+tagplot returns a list that contains two lists each with as many entries as figures were given. The first list contains the tagged figures. The second list contains the corresponding IDs as strings
+
+Optional parameters can be used to customize the tag process.
+- prefix : str, optional
+        Will be added as prefix to the ID.
+- id_method : str, optional
+        id_method for creating the ID. Create an ID by Unix time is referenced as 'time', create a random ID with id_method='random'. The default is 'time'.
+- location : string, optional
+        Location for ID to be displayed on the plot. Default is 'east'.
+
+Example:  
+```python
+FIG1 = plt.figure()  
+FIG2 = plt.figure()   
+FIGS_AS_LIST = [FIG1, FIG2]  
+[TAGGED_FIGS, ID] = tagplot(FIGS_AS_LIST, 'matplotlib', prefix='XY23_', id_method='random', location='west')
+```
+
+
+### publish()
+Save plot, data and measuring script.
+`publish(src_datapath, dst_path, figure, plot_name)`
+
+- "src_datapath" specifies the path to (raw) data that should be published.  
+- "dst_path" is the path to the destination directory, where all the data should be copied/exported to.  
+- "figure" expects the figure that was tagged and now should be saved as picture.  
+- "plot_name" will be the file name for the exported plot.  
+
+Optional parameters can be used to customize the publish process.
+- data_storage: str, optional  
+        Method how the data should be stored. Available options:  
+            - centralized: The raw data will copied only once. All other plots will reference this data via sym link.
+            - individual: The complete raw data will be copied to a folder for every plot, respectively.
+Example:
+`publish('/home/user/Documents/research_data', '/home/user/Documents/exported_data', FIG1, 'EnergyOverTime-Plot')
+
+## Build
+If you want to build PlotID yourself, follow these steps:  
+1. Download the source code from [Gitlab](https://git.rwth-aachen.de/plotid/plotid_python):  
+`git clone https://git.rwth-aachen.de/plotid/plotid_python.git`  
+`cd plotid_python`  
+2. [Optional] Create a virtual environment:  
+```bash
+pip install venv
+mkdir venv  
+python3 -m venv
+source venv/bin/activate
+```
+3. [Optional] Run unittests and coverage:  
+`python3 tests/runner_tests.py`
+4. Build the package
+`python3 -m build`
+
+## Documentation
+If you have more questions about PlotID, please have a look at the [documentation](link-to-docs).  
+Also have a look at the example.py that is shipped with PlotID.
diff --git a/docs/Makefile b/docs/Makefile
new file mode 100644
index 0000000000000000000000000000000000000000..d0c3cbf1020d5c292abdedf27627c6abe25e2293
--- /dev/null
+++ b/docs/Makefile
@@ -0,0 +1,20 @@
+# Minimal makefile for Sphinx documentation
+#
+
+# You can set these variables from the command line, and also
+# from the environment for the first two.
+SPHINXOPTS    ?=
+SPHINXBUILD   ?= sphinx-build
+SOURCEDIR     = source
+BUILDDIR      = build
+
+# Put it first so that "make" without argument is like "make help".
+help:
+	@$(SPHINXBUILD) -M help "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
+
+.PHONY: help Makefile
+
+# Catch-all target: route all unknown targets to Sphinx using the new
+# "make mode" option.  $(O) is meant as a shortcut for $(SPHINXOPTS).
+%: Makefile
+	@$(SPHINXBUILD) -M $@ "$(SOURCEDIR)" "$(BUILDDIR)" $(SPHINXOPTS) $(O)
diff --git a/docs/make.bat b/docs/make.bat
new file mode 100644
index 0000000000000000000000000000000000000000..747ffb7b3033659bdd2d1e6eae41ecb00358a45e
--- /dev/null
+++ b/docs/make.bat
@@ -0,0 +1,35 @@
+@ECHO OFF
+
+pushd %~dp0
+
+REM Command file for Sphinx documentation
+
+if "%SPHINXBUILD%" == "" (
+	set SPHINXBUILD=sphinx-build
+)
+set SOURCEDIR=source
+set BUILDDIR=build
+
+%SPHINXBUILD% >NUL 2>NUL
+if errorlevel 9009 (
+	echo.
+	echo.The 'sphinx-build' command was not found. Make sure you have Sphinx
+	echo.installed, then set the SPHINXBUILD environment variable to point
+	echo.to the full path of the 'sphinx-build' executable. Alternatively you
+	echo.may add the Sphinx directory to PATH.
+	echo.
+	echo.If you don't have Sphinx installed, grab it from
+	echo.https://www.sphinx-doc.org/
+	exit /b 1
+)
+
+if "%1" == "" goto help
+
+%SPHINXBUILD% -M %1 %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+goto end
+
+:help
+%SPHINXBUILD% -M help %SOURCEDIR% %BUILDDIR% %SPHINXOPTS% %O%
+
+:end
+popd
diff --git a/docs/source/conf.py b/docs/source/conf.py
new file mode 100644
index 0000000000000000000000000000000000000000..7ca2459f4a60345e7602be2281fb6ed590a463be
--- /dev/null
+++ b/docs/source/conf.py
@@ -0,0 +1,58 @@
+# Configuration file for the Sphinx documentation builder.
+#
+# This file only contains a selection of the most common options. For a full
+# list see the documentation:
+# https://www.sphinx-doc.org/en/master/usage/configuration.html
+
+# -- Path setup --------------------------------------------------------------
+
+# If extensions (or modules to document with autodoc) are in another directory,
+# add these directories to sys.path here. If the directory is relative to the
+# documentation root, use os.path.abspath to make it absolute, like shown here.
+#
+# import os
+# import sys
+# sys.path.insert(0, os.path.abspath('../../plotid'))
+
+
+# -- Project information -----------------------------------------------------
+
+project = 'PlotID'
+copyright = '2022, Example Author'
+author = 'Example Author'
+
+# The full version, including alpha/beta/rc tags
+release = '0.0.6'
+
+
+# -- General configuration ---------------------------------------------------
+
+# Add any Sphinx extension module names here, as strings. They can be
+# extensions coming with Sphinx (named 'sphinx.ext.*') or your custom
+# ones.
+extensions = [
+    'autoapi.extension'
+]
+autoapi_type = 'python'
+autoapi_dirs = ['../../plotid', '../../tests']
+
+# Add any paths that contain templates here, relative to this directory.
+templates_path = ['_templates']
+
+# List of patterns, relative to source directory, that match files and
+# directories to ignore when looking for source files.
+# This pattern also affects html_static_path and html_extra_path.
+exclude_patterns = []
+
+
+# -- Options for HTML output -------------------------------------------------
+
+# The theme to use for HTML and HTML Help pages.  See the documentation for
+# a list of builtin themes.
+#
+html_theme = 'alabaster'
+
+# Add any paths that contain custom static files (such as style sheets) here,
+# relative to this directory. They are copied after the builtin static files,
+# so a file named "default.css" will overwrite the builtin "default.css".
+html_static_path = ['_static']
diff --git a/docs/source/index.rst b/docs/source/index.rst
new file mode 100644
index 0000000000000000000000000000000000000000..34d079234c933658bce40762274688153c631d04
--- /dev/null
+++ b/docs/source/index.rst
@@ -0,0 +1,19 @@
+.. PlotID documentation master file, created by
+   sphinx-quickstart on Tue Jun 21 14:09:27 2022.
+   You can adapt this file completely to your liking, but it should at least
+   contain the root `toctree` directive.
+
+Welcome to PlotID's documentation!
+==================================
+
+.. toctree::
+   :maxdepth: 2
+   :caption: Contents:
+
+
+Indices and tables
+==================
+
+* :ref:`genindex`
+* :ref:`modindex`
+* :ref:`search`
diff --git a/docs/source/modules.rst b/docs/source/modules.rst
new file mode 100644
index 0000000000000000000000000000000000000000..dd354c8698ea6d990ff1b421ad0822ef78a8bb65
--- /dev/null
+++ b/docs/source/modules.rst
@@ -0,0 +1,7 @@
+plotid
+======
+
+.. toctree::
+   :maxdepth: 4
+
+   plotid
diff --git a/docs/source/plotid.rst b/docs/source/plotid.rst
new file mode 100644
index 0000000000000000000000000000000000000000..005afcdb7f40bef97789edbedf0d42196589d5b4
--- /dev/null
+++ b/docs/source/plotid.rst
@@ -0,0 +1,85 @@
+plotid package
+==============
+
+Submodules
+----------
+
+plotid.create\_id module
+------------------------
+
+.. automodule:: plotid.create_id
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.example module
+---------------------
+
+.. automodule:: plotid.example
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.filecompare module
+-------------------------
+
+.. automodule:: plotid.filecompare
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.hdf5\_external\_link module
+----------------------------------
+
+.. automodule:: plotid.hdf5_external_link
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.plotoptions module
+-------------------------
+
+.. automodule:: plotid.plotoptions
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.publish module
+---------------------
+
+.. automodule:: plotid.publish
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.save\_plot module
+------------------------
+
+.. automodule:: plotid.save_plot
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.tagplot module
+---------------------
+
+.. automodule:: plotid.tagplot
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+plotid.tagplot\_matplotlib module
+---------------------------------
+
+.. automodule:: plotid.tagplot_matplotlib
+   :members:
+   :undoc-members:
+   :show-inheritance:
+
+Module contents
+---------------
+
+.. automodule:: plotid
+   :members:
+   :undoc-members:
+   :show-inheritance:
diff --git a/plotid/.pylintrc b/plotid/.pylintrc
new file mode 100644
index 0000000000000000000000000000000000000000..40743c0f4e5afcd7e44a1512d484bda76b655e1f
--- /dev/null
+++ b/plotid/.pylintrc
@@ -0,0 +1,4 @@
+[MASTER]
+init-hook='import sys; sys.path.append("./plotid")'
+fail-under=9
+ignore=conf.py
diff --git a/plotid/__init__.py b/plotid/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/plotid/create_id.py b/plotid/create_id.py
new file mode 100644
index 0000000000000000000000000000000000000000..450e2dae6c2608a210849d5120c692986c3a7da4
--- /dev/null
+++ b/plotid/create_id.py
@@ -0,0 +1,37 @@
+# -*- coding: utf-8 -*-
+"""
+Create an identifier to print it on a plot.
+
+Functions:
+    create_id(str) -> string
+"""
+import time
+import uuid
+
+
+def create_id(id_method):
+    """
+    Create an Identifier (str).
+
+    Creates an (sometimes unique) identifier based on the selected method
+    if no method is selected method 1 will be the default method
+
+    Returns
+    -------
+    figure_id
+    """
+    match id_method:
+        case 'time':
+            figure_id = time.time()  # UNIX Time
+            figure_id = hex(int(figure_id))  # convert time to hexadecimal
+            time.sleep(0.5)   # break for avoiding duplicate IDs
+        case 'random':
+            figure_id = str(uuid.uuid4())  # creates a random UUID
+            figure_id = figure_id[0:8]            # only use first 8 numbers
+        case _:
+            raise ValueError(
+                f'Your chosen ID method "{id_method}" is not supported.\n'
+                'At the moment these methods are available:\n'
+                '"time": Unix time converted to hexadecimal\n'
+                '"random": Random UUID')
+    return figure_id
diff --git a/plotid/example.py b/plotid/example.py
new file mode 100644
index 0000000000000000000000000000000000000000..fcf7713916dc9ffc92ff7b9508f8b2d8778dcb7a
--- /dev/null
+++ b/plotid/example.py
@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+"""
+Example workflow for integrating plotID.
+
+With tagplot an ID can be generated an printed on the plot. To export the plot
+along with the corresponding research data and the plot generating script use
+the function publish.
+"""
+
+# %% Import modules
+import numpy as np
+# import h5py as h5
+import matplotlib.pyplot as plt
+from plotid.tagplot import tagplot
+from plotid.publish import publish
+
+# %% Set Project ID
+PROJECT_ID = "MR04_"
+
+# %% Choose Plot engine
+PLOT_ENGINE = "matplotlib"
+
+# %% Create sample data
+x = np.linspace(0, 10, 100)
+y = np.random.rand(100) + 2
+y_2 = np.sin(x) + 2
+
+# %% Create figures
+
+# 1. figure
+FIG1 = plt.figure()
+plt.plot(x, y, color='black')
+plt.plot(x, y_2, color='yellow')
+
+# 2. figure
+FIG2 = plt.figure()
+plt.plot(x, y, color='blue')
+plt.plot(x, y_2, color='red')
+
+# %% TagPlot
+
+# If multiple figures should be tagged, figures must be provided as list.
+FIGS_AS_LIST = [FIG1, FIG2]
+
+[TAGGED_FIGS, ID] = tagplot(FIGS_AS_LIST, PLOT_ENGINE, prefix=PROJECT_ID,
+                            id_method='random', location='west')
+
+# %% Save figure as tiff-file, but publish also exports the plot to a picture
+# file in the destination folder.
+for i, figure in enumerate(TAGGED_FIGS):
+    NAME = "Test"+str(i)+".tiff"
+    figure.savefig(NAME)
+
+# %% Publish
+# Arguments: Source directory, destination directory, figure, plot name,
+# publish-mode).
+publish('../../tests', '/home/chief/Dokumente/fst/plotid_python/data',
+        FIG1, 'Bild', 'individual')
diff --git a/plotid/filecompare.py b/plotid/filecompare.py
new file mode 100644
index 0000000000000000000000000000000000000000..2ccc81a36933b07cbcf6897a8112843e7f7c02a2
--- /dev/null
+++ b/plotid/filecompare.py
@@ -0,0 +1,9 @@
+# -*- coding: utf-8 -*-
+"""Compare if data already exists in published folder to avoid redundancy."""
+
+# Test des Moduls filecmp — File and Directory Comparisons
+
+import filecmp
+
+a = filecmp.cmp("2.py", "test_git.py")
+print(a)
diff --git a/plotid/hdf5_external_link.py b/plotid/hdf5_external_link.py
new file mode 100644
index 0000000000000000000000000000000000000000..09b96fa9ccd5b9fa84faa19826410a29ac413701
--- /dev/null
+++ b/plotid/hdf5_external_link.py
@@ -0,0 +1,11 @@
+"""Handling of hdf5 data files."""
+
+import h5py
+
+# Shows how to create an externalLink (symbolic) to a hdf5 File
+# Documentation available at:
+#    https://docs.h5py.org/en/stable/high/group.html#external-links
+myfile = h5py.File('./example.h5', 'w')
+myfile['ext link'] = h5py.ExternalLink("testdata_2.h5", "/")
+
+myfile.close()
diff --git a/plotid/plotoptions.py b/plotid/plotoptions.py
new file mode 100644
index 0000000000000000000000000000000000000000..6503422c73fe66f0fcd5a5fe9f44cdbd5ded1c7c
--- /dev/null
+++ b/plotid/plotoptions.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""Contains the PlotOption class."""
+
+
+class PlotOptions:
+    """
+    Container objects which include all plot options provided by plotid.
+
+    Methods
+    -------
+    __init__
+    validate_input: Check if input is correct type.
+
+    Attributes
+    ----------
+    figs : figure object
+        Figure that will be tagged.
+    prefix : str
+        Prefix that is placed before the ID.
+    id_method : int
+        Method that decides which method is used to generate the ID.
+    rotation : int
+        Rotation angle for the ID.
+    position : tuple
+        Relative position of the ID on the plot (x,y).
+    """
+
+    def __init__(self, figs, prefix, id_method, rotation, position):
+
+        self.figs = figs
+        self.prefix = prefix
+        self.id_method = id_method
+        self.rotation = rotation
+        self.position = position
+
+    def validate_input(self):
+        """
+        Validate if input for PlotOptions is correct type.
+
+        Raises
+        ------
+        TypeError
+            TypeError is thrown if one of the attributes is not the correct
+            type.
+
+        Returns
+        -------
+        0, if all checks succeed.
+
+        """
+        # %% Validate inputs
+        # Input validation for figs is done in submodules tagplot_$engine.py
+        if isinstance(self.prefix, str):
+            pass
+        else:
+            raise TypeError("Prefix is not a string.")
+
+        if isinstance(self.id_method, str):
+            pass
+        else:
+            raise TypeError('The chosen id_method is not a string.')
+
+        return 0
diff --git a/plotid/publish.py b/plotid/publish.py
new file mode 100644
index 0000000000000000000000000000000000000000..c5c53dd58da59cca6e3adb56149b3ca9e071726b
--- /dev/null
+++ b/plotid/publish.py
@@ -0,0 +1,109 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Publish a tagged plot along the corresponding research data.
+
+Export the tagged figure to a directory that also contains the raw data where
+the plot is based on. Additionally, the script that produced the plot will be
+copied to the destination directory.
+
+Functions:
+    publish(path-like, path-like, figure, string, string) -> None
+"""
+
+import os
+import shutil
+import sys
+import warnings
+from plotid.save_plot import save_plot
+
+
+def publish(src_datapath, dst_path, figure, plot_name,
+            data_storage='individual'):
+    """
+    Save plot, data and measuring script.
+
+    Parameters
+    ----------
+    src_datapath : string
+        Path to data that should be published.
+    dst_path : string
+        Path to the destination directory.
+    figure : figure object
+        Figure that was tagged and now should be saved as picture.
+    plot_name: string
+        Name for the exported plot.
+    data_storage: string
+        Method how the data should be stored. Available options:
+            centralized: The raw data will copied only once. All other plots
+                will reference this data via sym link.
+            individual: The complete raw data will be copied to a folder for
+                every plot, respectively. This is the default value.
+
+    Returns
+    -------
+    None.
+
+    """
+    # Check if source directory exists
+    if not os.path.exists(src_datapath):
+        raise FileNotFoundError('The specified source directory '
+                                'does not exist.')
+
+    # Check if destination directory is allowed path
+    dst_path_head, dst_dirname = os.path.split(dst_path)
+    if not os.path.exists(dst_path_head):
+        raise FileNotFoundError('The specified destination directory '
+                                'does not exist.')
+
+    # If dst dir already exists ask user if it should be overwritten or not.
+    if os.path.isdir(dst_path):
+        warnings.warn(f'Folder "{dst_dirname}" already exists – '
+                      'plot has already been published.')
+        overwrite_dir = input('Do you want to overwrite the existing folder?'
+                              ' (yes/no[default])\n')
+
+        if overwrite_dir in ('yes', 'y'):
+            shutil.rmtree(dst_path)
+        else:
+            raise RuntimeError('PlotID has finished without an export.\n'
+                               'Rerun TagPlot if you need a new ID or '
+                               'consider overwriting.')
+
+    # Export plot figure to picture.
+    plot_path = save_plot(figure, plot_name)
+
+    # Create invisible folder
+    dst_path_invisible = os.path.join(dst_path_head, '.' + dst_dirname)
+    # If invisible Folder exists, delete it (publish was not successful before)
+    if os.path.isdir(dst_path_invisible):
+        shutil.rmtree(dst_path_invisible)
+
+    match data_storage:
+        case 'centralized':
+            # Does nothing, not implemented yet
+            pass
+        case 'individual':
+            # Copy all files to destination directory
+            print('Copying data has been started. Depending on the size of '
+                  'your data this may take a while...')
+            # Copy data to invisible folder
+            shutil.copytree(src_datapath, dst_path_invisible)
+
+            # Copy script that calls this function to folder
+            shutil.copy2(sys.argv[0], dst_path_invisible)
+            # Copy plot file to folder
+            if os.path.isfile(plot_path):
+                shutil.copy2(plot_path, dst_path_invisible)
+                os.remove(plot_path)
+        case _:
+            raise ValueError('The data storage method {data_storage} '
+                             'is not available.')
+
+    print('Copying data finished. Starting to clean up.')
+
+    # If export was successful, make the directory visible
+    os.rename(dst_path_invisible, dst_path)
+    print(f'Publish was successful.\nYour plot "{plot_path}",\n'
+          f'your data "{src_datapath}"\nand your script "{sys.argv[0]}"\n'
+          f'were copied to {dst_path}\nin {data_storage} mode.')
diff --git a/plotid/save_plot.py b/plotid/save_plot.py
new file mode 100644
index 0000000000000000000000000000000000000000..0292e6155608e2d7b76b6b32c1915f7957c1fa3d
--- /dev/null
+++ b/plotid/save_plot.py
@@ -0,0 +1,39 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Export a plot figure to a picture file.
+
+Functions:
+    save_plot(figure, string) -> path-like
+"""
+
+import matplotlib
+import matplotlib.pyplot as plt
+
+
+def save_plot(figure, plot_name, extension='png'):
+    """
+    Export plot.
+
+    Parameters
+    ----------
+    figure : figure object
+        Figure that was tagged and now should be saved as picture.
+    plot_name: Name of the file where the plot will be saved to.
+    extension: string
+        File extension for the plot export.
+
+    Returns
+    -------
+    plot_path: Name of the created picture.
+
+    """
+    match type(figure):
+        case matplotlib.figure.Figure:
+            plt.figure(figure)
+            plot_path = plot_name + '.' + extension
+            plt.savefig(plot_path)
+        case _:
+            raise TypeError('The given figure is not a valid figure object.')
+
+    return plot_path
diff --git a/plotid/tagplot.py b/plotid/tagplot.py
new file mode 100644
index 0000000000000000000000000000000000000000..ba660b153fdfbd6fc6b17d02d9a5d156710a67bf
--- /dev/null
+++ b/plotid/tagplot.py
@@ -0,0 +1,93 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Tag your plot with an ID.
+
+For publishing the tagged plot along your research data have a look at the
+module publish.
+
+Functions:
+    TagPlot(figure object, string) -> list
+"""
+
+import warnings
+from plotid.plotoptions import PlotOptions
+from plotid.tagplot_matplotlib import tagplot_matplotlib
+
+
+def tagplot(figs, engine, prefix='', id_method='time', location='east'):
+    """
+    Tag your figure/plot with an ID.
+
+    After determining the plot engine, TagPlot calls the corresponding
+    function which tags the plot.
+
+    Parameters
+    ----------
+    figs : list
+        Figures that should be tagged.
+    engine : string
+        Plot engine which should be used to tag the plot.
+    prefix : string
+        Will be added as prefix to the ID.
+    id_method : string, optional
+        id_method for creating the ID. Create an ID by Unix time is referenced
+        as 'time', create a random ID with id_method='random'.
+        The default is 'time'.
+    location : string, optional
+        Location for ID to be displayed on the plot. Default is 'east'.
+
+    Raises
+    ------
+    RuntimeWarning
+        DESCRIPTION.
+
+    Returns
+    -------
+    list
+        The resulting list contains two lists each with as many entries as
+        figures were given. The first list contains the tagged figures.
+        The second list contains the corresponding IDs as strings.
+    """
+    if isinstance(location, str):
+        pass
+    else:
+        raise TypeError("Location is not a string.")
+
+    match location:
+        case 'north':
+            rotation = 0
+            position = (0.35, 0.975)
+        case 'east':
+            rotation = 90
+            position = (0.975, 0.35)
+        case 'south':
+            rotation = 0
+            position = (0.35, 0.015)
+        case 'west':
+            rotation = 90
+            position = (0.025, 0.35)
+        case 'southeast':
+            rotation = 0
+            position = (0.75, 0.015)
+        case 'custom':
+            # TODO: Get rotation and position from user input & check if valid
+            rotation = 0
+            position = (0.5, 0.5)
+        case _:
+            warnings.warn(f'Location "{location}" is not a defined '
+                          'location, TagPlot uses location "east" '
+                          'instead.')
+            rotation = 90
+            position = (0.975, 0.35)
+
+    option_container = PlotOptions(figs, prefix, id_method,
+                                   rotation, position)
+    option_container.validate_input()
+
+    match engine:
+        case 'matplotlib' | 'pyplot':
+            return tagplot_matplotlib(option_container)
+        case _:
+            raise ValueError(
+                f'The plot engine "{engine}" is not supported.')
diff --git a/plotid/tagplot_matplotlib.py b/plotid/tagplot_matplotlib.py
new file mode 100644
index 0000000000000000000000000000000000000000..7230f884b99199ea22511509b787e6bcbf50d0ce
--- /dev/null
+++ b/plotid/tagplot_matplotlib.py
@@ -0,0 +1,53 @@
+# -*- coding: utf-8 -*-
+"""
+Tag your matplotlib plot with an ID.
+
+Functions:
+    tagplot_matplotlib(figure object, string) -> list
+"""
+
+import matplotlib
+import matplotlib.pyplot as plt
+import plotid.create_id as create_id
+from plotid.plotoptions import PlotOptions
+
+
+def tagplot_matplotlib(plotid_object):
+    """
+    Add IDs to figures with matplotlib.
+
+    The ID is placed visual on the figure window and
+    as Tag (Property of figure).
+    TagPlot can tag multiple figures at once
+    """
+    # Check if plotid_object is a valid instance of PlotOptions
+    if not isinstance(plotid_object, PlotOptions):
+        raise TypeError('The given options container is not an instance'
+                        'of PlotOptions.')
+    # Check if figs is a valid figure or a list of valid figures
+    if isinstance(plotid_object.figs, matplotlib.figure.Figure):
+        plotid_object.figs = [plotid_object.figs]
+    elif isinstance(plotid_object.figs, list):
+        for figure in plotid_object.figs:
+            if isinstance(figure, matplotlib.figure.Figure):
+                pass
+    else:
+        raise TypeError('Figure is not a valid matplotlib-figure.')
+
+    fontsize = 'small'
+    color = 'grey'
+    all_ids_as_list = []
+
+    # Loop to create and position the IDs
+    for fig in plotid_object.figs:
+        figure_id = create_id.create_id(plotid_object.id_method)
+        figure_id = plotid_object.prefix + str(figure_id)
+        all_ids_as_list.append(figure_id)
+
+        plt.figure(fig.number)
+        plt.figtext(x=plotid_object.position[0], y=plotid_object.position[1],
+                    s=figure_id, ha='left', wrap=True,
+                    rotation=plotid_object.rotation,
+                    fontsize=fontsize, color=color)
+        fig.tight_layout()
+    return [plotid_object.figs, all_ids_as_list]
diff --git a/pyproject.toml b/pyproject.toml
new file mode 100644
index 0000000000000000000000000000000000000000..b519f7854682b15071afddae1cb25b862aa48f2b
--- /dev/null
+++ b/pyproject.toml
@@ -0,0 +1,3 @@
+[build-system]
+requires = ["setuptools>=43", "wheel"]
+build-backend = "setuptools.build_meta" 
diff --git a/requirements.txt b/requirements.txt
new file mode 100644
index 0000000000000000000000000000000000000000..6891c1fbed005067ba464b8b0882c55b2a87425f
--- /dev/null
+++ b/requirements.txt
@@ -0,0 +1,11 @@
+coverage==6.3.2
+cycler==0.11.0
+fonttools==4.32.0
+kiwisolver==1.4.2
+matplotlib==3.5.1
+numpy==1.22.3
+packaging==21.3
+Pillow==9.1.0
+pyparsing==3.0.8
+python-dateutil==2.8.2
+six==1.16.0
diff --git a/setup.cfg b/setup.cfg
new file mode 100644
index 0000000000000000000000000000000000000000..cf36c1f25ffc3e5e220ee13d3aa140f91f33c470
--- /dev/null
+++ b/setup.cfg
@@ -0,0 +1,31 @@
+[metadata]
+name = plotID
+version = 0.1.0
+author = Institut Fluidsystemtechnik within nfdi4ing at TU Darmstadt
+author_email = nfdi4ing@fst.tu-darmstadt.de
+description = The plotID toolkit supports researchers in tracking and storing relevant data in plots. Plots are labelled with an ID and the corresponding data is stored.
+long_description = file: README.md
+long_description_content_type = text/markdown
+url = https://git.rwth-aachen.de/plotid/plotid_python
+project_urls =
+    Bug Tracker = https://git.rwth-aachen.de/plotid/plotid_python/-/issues
+classifiers =
+    Programming Language :: Python :: 3.10
+    License :: OSI Approved :: Apache Software License
+    Operating System :: OS Independent
+    Development Status :: 2 - Pre-Alpha
+    Intended Audience :: Science/Research
+    Topic :: Scientific/Engineering :: Visualization
+
+[options]
+packages = plotid
+python_requires = >=3.10
+install_requires =
+    matplotlib
+    numpy
+   
+[options.extras_require]
+test =
+    coverage
+
+
diff --git a/tests/__init__.py b/tests/__init__.py
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/tests/runner_tests.py b/tests/runner_tests.py
new file mode 100644
index 0000000000000000000000000000000000000000..de973b1e9d01e9c67946cb520ee063c7a59cd660
--- /dev/null
+++ b/tests/runner_tests.py
@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+"""
+Runner for all tests regarding the plotid project.
+
+Includes starting all tests and measuring the code coverage.
+"""
+
+import sys
+import os
+import unittest
+import coverage
+
+path = os.path.abspath('plotid')
+sys.path.append(path)
+
+cov = coverage.Coverage()
+cov.start()
+
+loader = unittest.TestLoader()
+tests = loader.discover('.')
+testRunner = unittest.runner.TextTestRunner(verbosity=2)
+result = testRunner.run(tests)
+
+cov.stop()
+cov.save()
+cov.report(show_missing=True)
+
+if result.wasSuccessful():
+    covered = cov.report()
+    assert covered > 90, "Not enough coverage."
+    sys.exit(0)
+else:
+    sys.exit(1)
diff --git a/tests/test_create_id.py b/tests/test_create_id.py
new file mode 100644
index 0000000000000000000000000000000000000000..589405785640b5cd8ba74f69b9c8245ddfb92190
--- /dev/null
+++ b/tests/test_create_id.py
@@ -0,0 +1,35 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Unittests for CreateID
+"""
+
+import unittest
+import plotid.create_id as cid
+
+
+class TestCreateID(unittest.TestCase):
+    """
+    Class for all unittests of the create_id module.
+    """
+
+    def test_existence(self):
+        """Test if create_id returns a string."""
+        self.assertIsInstance(cid.create_id('time'), str)
+        self.assertIsInstance(cid.create_id('random'), str)
+
+    def test_errors(self):
+        """ Test if Errors are raised when id_method is wrong. """
+        with self.assertRaises(ValueError):
+            cid.create_id(3)
+        with self.assertRaises(ValueError):
+            cid.create_id('h')
+
+    def test_length(self):
+        """ Test if figure_id has the correct length. """
+        self.assertEqual(len(cid.create_id('time')), 10)
+        self.assertEqual(len(cid.create_id('random')), 8)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_publish.py b/tests/test_publish.py
new file mode 100644
index 0000000000000000000000000000000000000000..d09b7419f1793f9bae0a47788ebc06a1b1b60c74
--- /dev/null
+++ b/tests/test_publish.py
@@ -0,0 +1,126 @@
+# -*- coding: utf-8 -*-
+
+"""
+Unittests for publish
+"""
+
+import unittest
+import os
+import sys
+import shutil
+from unittest.mock import patch
+import matplotlib.pyplot as plt
+from plotid.publish import publish
+
+
+SRC_DIR = 'test_src_folder'
+PIC_NAME = 'test_picture'
+DST_DIR = 'test_dst_folder'
+DST_PARENT_DIR = 'test_parent'
+DST_PATH = os.path.join(DST_PARENT_DIR, DST_DIR)
+INVISIBLE_PATH = os.path.join(DST_PARENT_DIR, '.' + DST_DIR)
+fig = plt.figure()
+
+
+class TestPublish(unittest.TestCase):
+    """
+    Class for all unittests of the publish module.
+    """
+
+    def setUp(self):
+        """ Generate source and destination directory and test image. """
+        os.makedirs(SRC_DIR, exist_ok=True)
+        os.makedirs(DST_PARENT_DIR, exist_ok=True)
+
+    # Skip test if tests are run from command line.
+    @unittest.skipIf(not os.path.isfile(sys.argv[0]), 'Publish is not called '
+                     'from a Python script. Therefore, the script cannot be '
+                     'copied.')
+    def test_publish(self):
+        """ Test publish and check if an exported picture file exists. """
+        publish(SRC_DIR, DST_PATH, fig, PIC_NAME, 'individual')
+        assert os.path.isfile(os.path.join(DST_PATH, PIC_NAME + '.png'))
+
+    def test_src_directory(self):
+        """ Test if Error is raised when source directory does not exist."""
+        with self.assertRaises(FileNotFoundError):
+            publish('not_existing_folder', DST_PATH, fig,
+                    PIC_NAME, 'individual')
+
+    def test_dst_directory(self):
+        """ Test if Error is raised when destination dir does not exist."""
+        with self.assertRaises(FileNotFoundError):
+            publish(SRC_DIR, 'not_existing_folder',
+                    fig, PIC_NAME, 'individual')
+
+    # Skip test if tests are run from command line.
+    @unittest.skipIf(not os.path.isfile(sys.argv[0]), 'Publish is not called '
+                     'from a Python script. Therefore, the script cannot be '
+                     'copied.')
+    def test_dst_already_exists_yes(self):
+        """
+        Test if publish succeeds if the user wants to overwrite an existing
+        destination directory.
+        """
+        os.mkdir(DST_PATH)
+        # Mock user input as 'yes'
+        with patch('builtins.input', return_value='yes'):
+            publish(SRC_DIR, DST_PATH, fig, PIC_NAME, 'individual')
+
+    # Skip test if tests are run from command line.
+    @unittest.skipIf(not os.path.isfile(sys.argv[0]), 'Publish is not called '
+                     'from a Python script. Therefore, the script cannot be '
+                     'copied.')
+    def test_dst_already_exists_no(self):
+        """
+        Test if publish exits with error if the user does not want to overwrite
+        an existing destination directory by user input 'no'.
+        """
+        os.mkdir(DST_PATH)
+        # Mock user input as 'no'
+        with patch('builtins.input', return_value='no'):
+            with self.assertRaises(RuntimeError):
+                publish(SRC_DIR, DST_PATH, fig, PIC_NAME, 'individual')
+
+    # Skip test if tests are run from command line.
+    @unittest.skipIf(not os.path.isfile(sys.argv[0]), 'Publish is not called '
+                     'from a Python script. Therefore, the script cannot be '
+                     'copied.')
+    def test_dst_already_exists_empty(self):
+        """
+        Test if publish exits with error if the user does not want to overwrite
+        an existing destination directory by missing user input.
+        """
+        os.mkdir(DST_PATH)
+        # Mock user input as empty (no should be default).
+        with patch('builtins.input', return_value=''):
+            with self.assertRaises(RuntimeError):
+                publish(SRC_DIR, DST_PATH, fig, PIC_NAME, 'individual')
+
+    # Skip test if tests are run from command line.
+    @unittest.skipIf(not os.path.isfile(sys.argv[0]), 'Publish is not called '
+                     'from a Python script. Therefore, the script cannot be '
+                     'copied.')
+    def test_dst__invisible_already_exists(self):
+        """
+        Test if publish succeeds when there is already an invisible
+        directory from a previous run (delete the folder and proceed).
+        """
+        os.mkdir(INVISIBLE_PATH)
+        publish(SRC_DIR, DST_PATH, fig, PIC_NAME, 'individual')
+
+    def test_data_storage(self):
+        """
+        Test if Error is raised when unsupported storage method was chosen.
+        """
+        with self.assertRaises(ValueError):
+            publish(SRC_DIR, DST_PATH, fig, PIC_NAME, 'none_existing_method')
+
+    def tearDown(self):
+        """ Delete all files created in setUp. """
+        shutil.rmtree(SRC_DIR)
+        shutil.rmtree(DST_PARENT_DIR)
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_save_plot.py b/tests/test_save_plot.py
new file mode 100644
index 0000000000000000000000000000000000000000..0f28ae73c00ffffc2deb9d178ea277b2a8730667
--- /dev/null
+++ b/tests/test_save_plot.py
@@ -0,0 +1,33 @@
+# -*- coding: utf-8 -*-
+
+"""
+Unittests for save_plot
+"""
+
+import os
+import unittest
+import matplotlib.pyplot as plt
+from plotid.save_plot import save_plot
+
+FIGURE = plt.figure()
+PLOT_NAME = 'PLOT_NAME'
+
+
+class TestSavePlot(unittest.TestCase):
+    """
+    Class for all unittests of the save_plot module.
+    """
+
+    def test_save_plot(self):
+        """  Test if save_plot succeeds with valid arguments. """
+        save_plot(FIGURE, PLOT_NAME, extension='jpg')
+        os.remove(PLOT_NAME + '.jpg')
+
+    def test_wrong_fig_type(self):
+        """ Test if Error is raised when not a figure object is given. """
+        with self.assertRaises(TypeError):
+            save_plot('figure', 'PLOT_NAME', extension='jpg')
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_tagplot.py b/tests/test_tagplot.py
new file mode 100644
index 0000000000000000000000000000000000000000..cb71137911a71cccc28e348985a6f8973273f664
--- /dev/null
+++ b/tests/test_tagplot.py
@@ -0,0 +1,64 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Unittests for tagplot
+"""
+
+import unittest
+import matplotlib.pyplot as plt
+from tagplot import tagplot
+
+# Constants for tests
+FIG1 = plt.figure()
+FIG2 = plt.figure()
+FIGS_AS_LIST = [FIG1, FIG2]
+
+PROJECT_ID = "MR01"
+PLOT_ENGINE = "matplotlib"
+METHOD = 'time'
+
+
+class TestTagplot(unittest.TestCase):
+    """
+    Class for all unittests of the tagplot module.
+    """
+
+    def test_prefix(self):
+        """ Test if Error is raised if prefix is not a string. """
+        with self.assertRaises(TypeError):
+            tagplot(FIGS_AS_LIST, PLOT_ENGINE, 3, METHOD, location='southeast')
+
+    def test_plotengine(self):
+        """
+        Test if Errors are raised if the provided plot engine is not supported.
+        """
+        with self.assertRaises(ValueError):
+            tagplot(FIGS_AS_LIST, 1, PROJECT_ID, METHOD, location='north')
+        with self.assertRaises(ValueError):
+            tagplot(FIGS_AS_LIST, 'xyz', PROJECT_ID, METHOD, location='south')
+
+    def test_idmethod(self):
+        """
+        Test if Errors are raised if the id_method is not an string.
+        """
+        with self.assertRaises(TypeError):
+            tagplot(FIGS_AS_LIST, PLOT_ENGINE, PROJECT_ID, id_method=(0, 1),
+                    location='west')
+        with self.assertRaises(TypeError):
+            tagplot(FIGS_AS_LIST, PLOT_ENGINE, PROJECT_ID, id_method=1)
+        with self.assertRaises(TypeError):
+            tagplot(FIGS_AS_LIST, PLOT_ENGINE, PROJECT_ID, id_method=[0, 1])
+
+    def test_location(self):
+        """
+        Test if Errors are raised if the provided location is not supported.
+        """
+        with self.assertRaises(TypeError):
+            tagplot(FIGS_AS_LIST, PLOT_ENGINE, PROJECT_ID, METHOD, location=1)
+        with self.assertWarns(Warning):
+            tagplot(FIGS_AS_LIST, PLOT_ENGINE, PROJECT_ID, METHOD,
+                    location='up')
+
+
+if __name__ == '__main__':
+    unittest.main()
diff --git a/tests/test_tagplot_matplotlib.py b/tests/test_tagplot_matplotlib.py
new file mode 100644
index 0000000000000000000000000000000000000000..8f81b6f742b3c6f0b8d176341a9e643afec44f8e
--- /dev/null
+++ b/tests/test_tagplot_matplotlib.py
@@ -0,0 +1,62 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+"""
+Unittests for TagPlot_matplotlib
+"""
+
+import unittest
+import matplotlib.pyplot as plt
+from matplotlib.figure import Figure
+from plotid.tagplot_matplotlib import tagplot_matplotlib
+from plotid.plotoptions import PlotOptions
+
+
+FIG1 = plt.figure()
+FIG2 = plt.figure()
+FIGS_AS_LIST = [FIG1, FIG2]
+
+# Constants for tests
+PROJECT_ID = "MR01"
+METHOD = 'time'
+ROTATION = 90
+POSITION = (0.975, 0.35)
+
+
+class TestTagplotMatplotlib(unittest.TestCase):
+    """
+    Class for all unittests of the tagplot_matplotlib module.
+    """
+
+    def test_mplfigures(self):
+        """ Test of returned objects. Check if they are matplotlib figures. """
+        options = PlotOptions(FIGS_AS_LIST, PROJECT_ID, METHOD, ROTATION,
+                              POSITION)
+        [figs, _] = tagplot_matplotlib(options)
+        self.assertIsInstance(figs[0], Figure)
+        self.assertIsInstance(figs[1], Figure)
+
+    def test_single_mplfigure(self):
+        """
+        Test of returned objects. Check if matplotlib figures are returned,
+        if a single matplot figure is given (not as a list).
+        """
+        options = PlotOptions(FIG1, PROJECT_ID, METHOD, ROTATION, POSITION)
+        [figs, _] = tagplot_matplotlib(options)
+        self.assertIsInstance(figs[0], Figure)
+
+    def test_mplerror(self):
+        """ Test if Error is raised if wrong type of figures is given. """
+        options = PlotOptions(3, PROJECT_ID, METHOD, ROTATION, POSITION)
+        with self.assertRaises(TypeError):
+            tagplot_matplotlib(options)
+
+    def test_mpl_plotoptions(self):
+        """
+        Test if Error is raised if not an instance of PlotOptions is passed.
+        """
+        with self.assertRaises(TypeError):
+            tagplot_matplotlib('wrong_object')
+
+
+if __name__ == '__main__':
+    unittest.main()