Check if the DTEP can act as a top level DTEP. This means that the document can be of this type. Some pseudo DTEPs cannot act as a top level DTEP, like PHP as they are always included as part of another DTEP, while some others can be included and act as standalone as well, like the case of CSS.
Egiaztatu DTEP- ak goi mailako DTEP bezala jokatu badezake. Honek dokumentua mota honetako izan daitekeela esan nahi du. Zenbait sasi- DTEP- k ezin dute goi- mailako DTEP bezala jokatu (adibidez PHP), beste DTEP baten zati bezala txertatzen direlako beti. Beste batzuk, aldiz, txertatu eta bere kasa jokatu dezakete (adibidez CSS).