Perhaps the longest - standing principle in the design of xquery is that xquery should be a functional language incorporating the principle of compositionality 也許xquery設(shè)計(jì)中最長(zhǎng)期有效的原則就是, xquery應(yīng)該是一門包含了組合性原則的函數(shù)式語言。
百科解釋
In mathematics, semantics, and philosophy of language, the Principle of Compositionality is the principle that the meaning of a complex expression is determined by the meanings of its constituent expressions and the rules used to combine them. This principle is also called Frege's Principle, because Gottlob Frege is widely credited for the first modern formulation of it.