including as subsets within it academic and nonacademic components.

= including academic and nonacademic components as subsets within it

including为现在分词，后接宾语academic and nonacademic components 和as介词短语作方式状语。由于宾语比较长或者为了突出宾语，将宾语后移到状语之后，这种现象称为宾语后移。整个including现在分词短语作补充性状语，对形容词all-embracing作补充说明。