%general-entities; ]> Before commiting any changes, it's important to check that you have all the syntax correct and that the book can actually pass through xsltproc without any problems. Instructions on how to render the book can be obtained by reading the INSTALL and README files that are in the LFS Subversion repository. The Makefile that accompanies the XML sources for the book have various targets that aid in the rendering of the book. Firstly, make validate ensures that the XML is valid, and that further processing with xsltproc won't fail. This target was added because rendering the full book into HTML or PDF can take some time. The most common cause of rendering failures is because of invalid XML, hence this target was added as a time-saving measure. Secondly, make will render the HTML output. Finally, make pdf will render the PDF output.