Description: Characterization of a document in terms of the purpose or information it contains; Name: Document type
Description: classification of a document according to its purpose or the information it contains; Name: type of document
Description: norm/stipulation describing the explosion protection. The explosion protection type, the device category, the temperature class as well as the device / explosion group are taken from this norm. The type and number of the norm/stipulation with issue year and issue month must be given; Name: Reference norm of the explosion protection