1. Preamble

The data presented in this article was obtained using IXXO's Web Mining solution, which enables us to collect and identify relevant information on the subject.

The players in the directory are classified by :

• position in the hydrogen value chain;

• job(s) performed ;

• business sector ;

• type of organization ;

• countries ;

• contact details ;

• description (date of creation, sales, number of employees, etc.).