XQuery has all the rudimentary functionality of most highlevellanguages (if-then-else, for, variables, functions, and arithmetic operators).
XQuery提供了大多数高级语言的所有基本功能(if - then - else、for、变量、函数和算术操作符)。
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What most programmers think about when they think about variable or object type owes a lot to the vagaries of computer CPUs — even among programmers of highlevellanguages like Python.
In that sense, VFS is like object orientation, high-levellanguages, or run-time libraries: it provides nothing new, and you can do in your own programming everything VFS does.