<?xml version="1.0"?>
<fo:root xmlns:fo="http://www.w3.org/1999/XSL/Format"
    font-family="sans-serif"
    font-size="24pt"
    font-weight="bold"
>
  <fo:layout-master-set>
    <fo:simple-page-master master-name="body-page"
        margin-top="0.5in"
        margin-left="0.5in"
        margin-right="0.5in"
        margin-bottom="0.5in"
        page-height="11in"
        page-width="8.5in">
      <fo:region-body
          margin-top="1.5in"
          margin-bottom="1.5in"
          border-width="1pt"
          border-style="solid"
          border-color="teal"
          column-count="3"
          column-gap="12pt"
      />
      <fo:region-before 
          extent="1in"/>
      <fo:region-after 
          border-width="1pt"
          border-style="solid"
          border-color="green"
          extent="1in"/>
    </fo:simple-page-master>
  </fo:layout-master-set>
  <fo:page-sequence master-reference="body-page">
    <fo:static-content flow-name="xsl-region-after">
      <fo:block>
        <fo:page-number/>
      </fo:block>
    </fo:static-content>
    <fo:static-content flow-name="xsl-footnote-separator">
      <fo:block
          font-size="6pt"
          border-before-width="1pt"
          border-before-style="solid"
      >
        <fo:leader/>
      </fo:block>
    </fo:static-content>
    <fo:flow flow-name="xsl-region-body"
    >
      <fo:block
          border-style="solid"
          border-width="1pt"
          border-color="yellow"
          space-before="1em"
      >This is a block in the first column</fo:block>
      <fo:block
          border-style="solid"
          border-width="1pt"
          border-color="purple"
          space-before="1em"
          break-before="column"
        >This is a block in the second column</fo:block>
      <fo:block
          border-style="solid"
          border-width="1pt"
          border-color="blue"
          space-before="1em"
          break-before="column"
        >This is a block in the third column</fo:block>
      <fo:block 
          space-before="1em"
          space-before.conditionality="retain"
          border-style="solid"
          border-width="1pt"
          border-color="red"
          span="all"
      >This block spans all three columns</fo:block>
    </fo:flow>
  </fo:page-sequence>
</fo:root>