Update to README

README.md

 # Packager
 
 ## Description
-Implements MPAI CAE-ARP (https://mpai.community/standards/mpai-cae/about-mpai-cae/#Figure2) Packager Technical Specification, providing:
-- Access Copy Files:
-  1. Restored Audio Files.
-  2. Editing List.
-  3. Set of Irregularity Images in a .zip file.
+Implements the Technical Specification of [MPAI CAE-ARP](https://mpai.community/standards/mpai-cae/about-mpai-cae/#Figure2) *Packager* AIM, providing:
+* Access Copy Files:
+  1. Restored Audio Files;
+  2. Editing List;
+  3. Set of Irregularity Images in a .zip file;
   4. Irregularity File.
-- Preservation Master Files:
-  1. Preservation Audio File.
+* Preservation Master Files:
+  1. Preservation Audio File;
   2. Preservation Audio-Visual File where the audio has been replaced with the Audio of the Preservation Audio File
-     fully synchronised with the video.
-  3. Set of Irregularity Images in a .zip file.
+     fully synchronised with the video;
+  3. Set of Irregularity Images in a .zip file;
   4. Irregularity File.
 
 ## Getting started
-The Packager is written in Python 3.9 which is therefore required to run the program.
+The *Packager* is written in Python 3.9 which is therefore required to run the program.
 
 ## Installation
-PyYaml (https://pyyaml.org) is required for reading the configuration file. You can install it with:
+[PyYaml](https://pyyaml.org) is required for reading the configuration file. You can install it with:
 ```
 pip install pyyaml
 ```
-MoviePy (https://zulko.github.io/moviepy/) is required for replacing the audio of the Preservation Audio-Visual File. You can install it with:
+[MoviePy](https://zulko.github.io/moviepy/) is required for replacing the audio of the Preservation Audio-Visual File. You can install it with:
 ```
 pip install moviepy
 ```
@@ -35,31 +35,75 @@ pip install -r requirements.txt
 ## Usage
 Once the libraries are installed, you should customise the configuration file `config.yaml`.
 There are two required parameters:
-1) `WORKING_PATH` that specifies the working path where all input files are stored and where all output files will be saved;
-2) `PRESERVATION_FILES_NAME` that specifies the name of the preservation files to be considered.
+1. `WORKING_PATH` that specifies the working path where all input files are stored and where all output files will be saved;
+2. `PRESERVATION_FILES_NAME` that specifies the name of the preservation files to be considered.
 
-You can now launch the Packager from the command line with:
+To execute the script without issues, the inner structure of the `WORKING_PATH` directory shall be like:
+```
+.
+├── AccessCopyFiles
+├── PreservationAudioFile
+│   ├── File1.wav
+│   ├── File2.wav
+│   └── ...
+├── PreservationAudioVisualFile
+│   ├── File1.wav
+│   ├── File2.wav
+│   └── ...
+├── PreservationMasterFiles
+└── temp
+    ├── AudioAnalyser_IrregullarityFileOutput1.json
+    ├── AudioAnalyser_IrregullarityFileOutput2.json
+    ├── AudioBlocks
+    │   ├── AudioBlock1.jpg
+    │   ├── AudioBlock2.jpg
+    │   └── ...
+    ├── EditingList.json
+    ├── IrregularityImages
+    │   ├── IrregularityImage1.jpg
+    │   ├── IrregularityImage2.jpg
+    │   └── ...
+    ├── RestoredAudioFiles
+    │   ├── RestoredAudioFile1.wav
+    │   └── RestoredAudioFile2.wav
+    │   └── ...
+    ├── TapeIrregularityClassifier_IrregularityFileOutput1.json
+    ├── TapeIrregularityClassifier_IrregularityFileOutput2.json
+    ├── VideoAnalyser_IrregularityFileOutput1.json
+    └── VideoAnalyser_IrregularityFileOutput2.json
+```
+`PreservationAudioFile` and `PreservationAudioVisualFile` directories contain the input of ARP Workflow, while `AccessCopyFiles` and `PreservationMasterFiles` directories contain its output. `temp` directory is used to store all files exchanged between the AIMs within the Workflow.
+
+Please note that:
+* Corresponding input files shall present the same name;
+* The name of Irregularity Files given above is ***mandatory***;
+* The name of files within `AudioBlocks`, `IrregularityImages` and `RestoredAudioFiles` directories is not relevant to the *Packager*;
+* The *Packager* will create directories named as the input files (e.g.: with input files `File1.wav` and `File1.mov`, output files will be contained in `AccessCopyFiles/File1/` and `PreservationMasterFiles/File1/`).
+
+With this structure, `PRESERVATION_FILES_NAME` parameter could be equal to `File1` or `File2`.
+
+You can now launch the *Packager* from the command line with:
 ```
 python3 main.py
 ```
 Useful log information will be displayed during execution, requiring occasional interaction.
 
 ## Support
-If you have any problem you can contact us at:
-- Nadir Dalla Pozza (nadir.dallapozza@unipd.it)
-- Niccolò Pretto (niccolo.pretto@unipd.it)
+If you require additional information or have any problem, you can contact us at:
+* Nadir Dalla Pozza (nadir.dallapozza@unipd.it);
+* Niccolò Pretto (niccolo.pretto@unipd.it).
 
 ## Authors and acknowledgment
 This project was developed by:
-- Nadir Dalla Pozza (Università degli Studi di Padova)
-- Niccolò Pretto (Università degli Studi di Padova)
-- Sergio Canazza (Università degli Studi di Padova)
+* Nadir Dalla Pozza (University of Padova);
+* Niccolò Pretto (University of Padova);
+* Sergio Canazza (University of Padova).
 
-This project takes advantage of with the following libraries:
-- MoviePy (https://zulko.github.io/moviepy/)
-- PyYaml (https://pyyaml.org)
+This project takes advantage of the following libraries:
+* [MoviePy](https://zulko.github.io/moviepy/);
+* [PyYaml](https://pyyaml.org).
 
-Developed with Python IDE PyCharm Community (https://www.jetbrains.com/pycharm/).
+Developed with Python IDE [PyCharm Community](https://www.jetbrains.com/pycharm/).
 
 ## License
-This project is licensed with GNU GPL v3.0.
+This project is licensed with [GNU GPL v3.0](https://www.gnu.org/licenses/gpl-3.0.html).