ui:decorateui:decorate
The decorate tag is identical to the composition tag, except that ui:decorate, unlike ui:composition, does not disregard all content outside of the tag. The decorate is useful when you want to decorate some content in a page, for example, you might want to decorate a list of items, like this:

Because JSF does not disregard everything outside of the ui:decorate tag, ui:decorate can be used to decorate pieces of a page.
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