ase during the XML London 2017 demojam. The demo pipeline can be found <a
          href="https://subversion.le-tex.de/common/presentations/2017-06-11_xmllondon_xproc/samples/xpl/expand-and-check-css.xpl"
          >here</a>. You might need to view the source in order to see the XProc – your browser might just show the embedded
        HTML documentation. Also please note that the pipeline’s <code>p:import</code>ed pipelines use canonical URLs that will
        be resolved by an <a
          href="https