diff --git a/coreax/__init__.py b/coreax/__init__.py
index 143f486c0..85125554a 100644
--- a/coreax/__init__.py
+++ b/coreax/__init__.py
@@ -1 +1,26 @@
+# © Crown Copyright GCHQ
+#
+# 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.
+
+r"""
+Coreax library for generation of compressed representations of datasets.
+
+The coreax library contains code to address the following generic problem. Given an
+:math:`n \times d` dataset, generate a :math:`m \times d` dataset, with :math:`m << n`
+such that the generated dataset contains as much of the information from the original
+dataset as possible. The generated dataset is often called a coreset.
+"""
+
 # __init__.py
+
+__version__ = "0.1.0"
diff --git a/examples/__init__.py b/examples/__init__.py
index e69de29bb..2666a72fe 100644
--- a/examples/__init__.py
+++ b/examples/__init__.py
@@ -0,0 +1,20 @@
+# © Crown Copyright GCHQ
+#
+# 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.
+
+"""
+Example use cases of the coreax library.
+
+Examples showcase coreset generation on different datasets, as well as using different
+coreset generation algorithms to illustrate the capabilities of the library.
+"""
diff --git a/tests/__init__.py b/tests/__init__.py
index e69de29bb..82b3b100c 100644
--- a/tests/__init__.py
+++ b/tests/__init__.py
@@ -0,0 +1,13 @@
+# © Crown Copyright GCHQ
+#
+# 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/tests/integration/__init__.py b/tests/integration/__init__.py
index e69de29bb..39692d338 100644
--- a/tests/integration/__init__.py
+++ b/tests/integration/__init__.py
@@ -0,0 +1,19 @@
+# © Crown Copyright GCHQ
+#
+# 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.
+
+"""
+Integration tests to verify functionality of the coreax library.
+
+Tests for end-to-end runs in typical applications of the coreax library.
+"""
diff --git a/tests/unit/__init__.py b/tests/unit/__init__.py
index e69de29bb..539cf6349 100644
--- a/tests/unit/__init__.py
+++ b/tests/unit/__init__.py
@@ -0,0 +1,20 @@
+# © Crown Copyright GCHQ
+#
+# 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.
+
+"""
+Unit tests to verify functionality of the coreax library.
+
+Tests for specific functions, methods and classes in the coreax library, to ensure
+functionality is as expected.
+"""