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If you look at Vases, most of the adjective-style headings are ancient or cross-boundary (at least modern boundaries) styles, e.g., Vases, Greek--Italy; Vases, Geometric--Greece. The modern countries are mostly divided by place, e.g. Vases--Germany; Vases--Italy. As with Art objects, we have Vases, Chinese and none at LCV under Vases--China. Possibly Chinese/China is being treated more like ancient western styles.
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Styles or movements are generally treated through cuttering under a period and artist groups will be treated under A-Z for special artist. You may very well find collectives established some time ago that you wouldn't treat that way today. Groups that wrote manifestos would probably be treated a as agents of collective thought (corporate bodies) today. If the group/movement is already established, generally accept how it was established, whether NAF or SAF.
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