The first part of the expression contains the namespace declarations (in this case, UBL 2.0 Invoice) and some auxiliary namespaces; these are used to ensure uniqueness of all element names used.

Compared with the 90 s, hand-painted as main means of expression of a project design, now most of my hand-painted is just used for auxiliary express of the design thinking process.

Intervening IAP expression or function in tumor cells has already been studied as an auxiliary therapy of traditional tumor treatment.