Doka is the name of company who manufacture the shuttering material.
Its main products are H- beam which are used as primary and secondary members below sheeting plywood to take load from above and transfer it to temparory staging below.
H-Beams are product of wood and manufactured timber.
You can get more details about there products on there website.
Doka Formworks are engineered Formwork system and its same like other system with different type materials such as, Mivan (its a name of company but it produces aluminium shuttering / formwork)
Biggest user of Doka shuttering system in India is L&T, but now they produce same material on their own under their own name (L&T Formwork) at their plant in Pondicherry