Keep things together

This time i will explain a functionality of xsl-fop: "keep-together" attribute.
In a pdf page (report), that is created by xsl-fop, i don't want that a block is split between page, if it doesn't enter completely in one page. So the solution is add the keep-together attribute in the fo:block, and more specifically this is the right attribute: keep-together.within-page="always".
In this case (within-page) the block is not split between two different pages, but the block is written all in the next page.