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<html><head><meta http-equiv="content-type" content="text/html; charset=utf-8"/><title>Pollen: the book is a program</title><link rel="stylesheet" type="text/css" href="scribble.css" title="default"/><link rel="stylesheet" type="text/css" href="racket.css" title="default"/><link rel="stylesheet" type="text/css" href="manual-style.css" title="default"/><link rel="stylesheet" type="text/css" href="manual-racket.css" title="default"/><script type="text/javascript" src="scribble-common.js"></script><script type="text/javascript" src="manual-racket.js"></script><!--[if IE 6]><style type="text/css">.SIEHidden { overflow: hidden; }</style><![endif]--></head><body id="scribble-racket-lang-org"><div class="tocset"><div class="tocview"><div class="tocviewlist tocviewlisttopspace"><div class="tocviewtitle"><table cellspacing="0" cellpadding="0"><tr><td style="width: 1em;"><a href="javascript:void(0);" title="Expand/Collapse" class="tocviewtoggle" onclick="TocviewToggle(this,&quot;tocview_0&quot;);">&#9660;</a></td><td></td><td><a href="index.html" class="tocviewselflink" data-pltdoc="x">Pollen:<span class="mywbr"> &nbsp;</span> the book is a program</a></td></tr></table></div><div class="tocviewsublistonly" style="display: block;" id="tocview_0"><table cellspacing="0" cellpadding="0"><tr><td align="right">1&nbsp;</td><td><a href="Installation.html" class="tocviewlink" data-pltdoc="x">Installation</a></td></tr><tr><td align="right">2&nbsp;</td><td><a href="quick-tour.html" class="tocviewlink" data-pltdoc="x">Quick tour</a></td></tr><tr><td align="right">3&nbsp;</td><td><a href="Backstory.html" class="tocviewlink" data-pltdoc="x">Backstory</a></td></tr><tr><td align="right">4&nbsp;</td><td><a href="big-picture.html" class="tocviewlink" data-pltdoc="x">The big picture</a></td></tr><tr><td align="right">5&nbsp;</td><td><a href="first-tutorial.html" class="tocviewlink" data-pltdoc="x">First tutorial</a></td></tr><tr><td align="right">6&nbsp;</td><td><a href="second-tutorial.html" class="tocviewlink" data-pltdoc="x">Second tutorial</a></td></tr><tr><td align="right">7&nbsp;</td><td><a href="raco-pollen.html" class="tocviewlink" data-pltdoc="x">Using <span class="stt">raco pollen</span></a></td></tr><tr><td align="right">8&nbsp;</td><td><a href="File_formats.html" class="tocviewlink" data-pltdoc="x">File formats</a></td></tr><tr><td align="right">9&nbsp;</td><td><a href="reader.html" class="tocviewlink" data-pltdoc="x">&#9674; command overview</a></td></tr><tr><td align="right">10&nbsp;</td><td><a href="Module_reference.html" class="tocviewlink" data-pltdoc="x">Module reference</a></td></tr><tr><td align="right">11&nbsp;</td><td><a href="Acknowledgments.html" class="tocviewlink" data-pltdoc="x">Acknowledgments</a></td></tr><tr><td align="right">12&nbsp;</td><td><a href="License___source_code.html" class="tocviewlink" data-pltdoc="x">License &amp; source code</a></td></tr><tr><td align="right"></td><td><a href="doc-index.html" class="tocviewlink" data-pltdoc="x">Index</a></td></tr></table></div></div></div><div class="tocsub"><div class="tocsubtitle">On this page:</div><table class="tocsublist" cellspacing="0"><tr><td><span class="tocsublinknumber"></span><a href="#%28part._.Pollen__the_book_is_a_program%29" class="tocsubseclink" data-pltdoc="x">Pollen:<span class="mywbr"> &nbsp;</span> the book is a program</a></td></tr></table></div></div><div class="maincolumn"><div class="main"><div class="versionbox"><span class="version">6.0.1.13</span></div><div class="navsettop"><span class="navleft"><div class="nosearchform"></div>&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<span class="nonavigation">&larr; prev</span>&nbsp;&nbsp;<span class="nonavigation">up</span>&nbsp;&nbsp;<a href="Installation.html" title="forward to &quot;1 Installation&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div><h2><a name="(part._.Pollen__the_book_is_a_program)"></a><a name="(mod-path._pollen)"></a>Pollen: the book is a program</h2><div class="SAuthorListBox"><span class="SAuthorList"><p class="author">Matthew Butterick &lt;<a href="mailto:mb@mbtype.com">mb@mbtype.com</a>&gt;</p></span></div><p><table cellspacing="0" cellpadding="0" class="defmodule"><tr><td align="left"><span class="hspace">&nbsp;</span><a href="http://docs.racket-lang.org/guide/Module_Syntax.html#%28part._hash-lang%29" class="RktModLink" data-pltdoc="x"><span class="RktMod">#lang</span></a><span class="hspace">&nbsp;</span><a href="index.html" class="RktModLink" data-pltdoc="x"><span class="RktSym">pollen</span></a></td><td align="right"><span class="RpackageSpec"><span class="Smaller">&nbsp;package:</span> <span class="stt">pollen</span></span></td></tr></table></p><p>Pollen is a publishing system that helps authors create beautiful and functional web-based books. Pollen includes tools for writing, designing, programming, testing, and publishing.</p><p>I used Pollen to create my book <a href="http://practicaltypography.com">Butterick&rsquo;s Practical Typography</a>. Sure, go take a look. Is it better than the last digital book you encountered? Yes it is. Would you like your book to look like that? If so, keep reading.</p><p><div class="SIntrapara">At the core of Pollen is an argument:
</div><div class="SIntrapara"><ul><li><p>First, that digital books should be the best books we&rsquo;ve ever had. So far, they&rsquo;re not even close.</p></li><li><p>Second, that because digital books are software, an author shouldn&rsquo;t think of a book as merely data. <span style="font-weight: bold">The book is a program.</span></p></li><li><p>Third, that the way we make digital books better than their predecessors is by exploiting this programmability.</p></li></ul></div></p><p>That&rsquo;s what Pollen is for.</p><p>Not that you need to be a programmer to use Pollen. On the contrary, the Pollen language is markup-based, so you can write &amp; edit text naturally. But when you want to automate repetitive tasks, add cross-references, or pull in data from other sources, you can access a full programming language from within the text.</p><p>That language is Racket. I chose Racket because while the idea for Pollen had been with me for several years, it simply wasn&rsquo;t possible to build it with other languages. So if it&rsquo;s unfamiliar to you, don&rsquo;t panic. It was unfamiliar to me. Once you see what you can do with Pollen &amp; Racket, you may be persuaded. I was.</p><p>Or, if you can find a better digital-publishing tool, use that. But I&rsquo;m never going back to the way I used to work.</p><table cellspacing="0" cellpadding="0"><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Installation.html" class="toptoclink" data-pltdoc="x">1<span class="hspace">&nbsp;</span>Installation</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html" class="toptoclink" data-pltdoc="x">2<span class="hspace">&nbsp;</span>Quick tour</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Creating_a_source_file%29" class="toclink" data-pltdoc="x">2.1<span class="hspace">&nbsp;</span>Creating a source file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Running_a_source_file%29" class="toclink" data-pltdoc="x">2.2<span class="hspace">&nbsp;</span>Running a source file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Naming__saving__and_rendering_a_source_file%29" class="toclink" data-pltdoc="x">2.3<span class="hspace">&nbsp;</span>Naming, saving, and rendering a source file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.The_project_server%29" class="toclink" data-pltdoc="x">2.4<span class="hspace">&nbsp;</span>The project server</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Intermission%29" class="toclink" data-pltdoc="x">2.5<span class="hspace">&nbsp;</span>Intermission</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Pollen_as_a_preprocessor%29" class="toclink" data-pltdoc="x">2.6<span class="hspace">&nbsp;</span>Pollen as a preprocessor</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Markdown_mode%29" class="toclink" data-pltdoc="x">2.7<span class="hspace">&nbsp;</span>Markdown mode</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Markup_mode%29" class="toclink" data-pltdoc="x">2.8<span class="hspace">&nbsp;</span>Markup mode</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.Templates%29" class="toclink" data-pltdoc="x">2.9<span class="hspace">&nbsp;</span>Templates</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.P.S_for_.Scribble_users%29" class="toclink" data-pltdoc="x">2.10<span class="hspace">&nbsp;</span>PS for Scribble users</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="quick-tour.html#%28part._.The_end_of_the_beginning%29" class="toclink" data-pltdoc="x">2.11<span class="hspace">&nbsp;</span>The end of the beginning</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Backstory.html" class="toptoclink" data-pltdoc="x">3<span class="hspace">&nbsp;</span>Backstory</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Backstory.html#%28part._.Web_development_and_its_discontents%29" class="toclink" data-pltdoc="x">3.1<span class="hspace">&nbsp;</span>Web development and its discontents</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Backstory.html#%28part._.The_better_idea__a_programming_model%29" class="toclink" data-pltdoc="x">3.2<span class="hspace">&nbsp;</span>The better idea: a programming model</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Backstory.html#%28part.__.Now_you_have_two_problems_%29" class="toclink" data-pltdoc="x">3.3<span class="hspace">&nbsp;</span>&ldquo;Now you have two problems&rdquo;</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Backstory.html#%28part._.Rethinking_the_solution_for_digital_books%29" class="toclink" data-pltdoc="x">3.4<span class="hspace">&nbsp;</span>Rethinking the solution for digital books</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Backstory.html#%28part._.Enter_.Racket%29" class="toclink" data-pltdoc="x">3.5<span class="hspace">&nbsp;</span>Enter Racket</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Backstory.html#%28part._.What_is_.Pollen_%29" class="toclink" data-pltdoc="x">3.6<span class="hspace">&nbsp;</span>What is Pollen?</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html" class="toptoclink" data-pltdoc="x">4<span class="hspace">&nbsp;</span>The big picture</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.The_book_is_a_program%29" class="toclink" data-pltdoc="x">4.1<span class="hspace">&nbsp;</span>The book is a program</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.One_language__multiple_dialects%29" class="toclink" data-pltdoc="x">4.2<span class="hspace">&nbsp;</span>One language, multiple dialects</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.Development_environment%29" class="toclink" data-pltdoc="x">4.3<span class="hspace">&nbsp;</span>Development environment</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.A_special_data_structure_for_.H.T.M.L%29" class="toclink" data-pltdoc="x">4.4<span class="hspace">&nbsp;</span>A special data structure for HTML</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.Pollen_command_syntax%29" class="toclink" data-pltdoc="x">4.5<span class="hspace">&nbsp;</span>Pollen command syntax</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.The_preprocessor%29" class="toclink" data-pltdoc="x">4.6<span class="hspace">&nbsp;</span>The preprocessor</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.Templated_source_files%29" class="toclink" data-pltdoc="x">4.7<span class="hspace">&nbsp;</span>Templated source files</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="big-picture.html#%28part._.Pagetrees%29" class="toclink" data-pltdoc="x">4.8<span class="hspace">&nbsp;</span>Pagetrees</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html" class="toptoclink" data-pltdoc="x">5<span class="hspace">&nbsp;</span>First tutorial</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._tutorial-1._.Prerequisites%29" class="toclink" data-pltdoc="x">5.1<span class="hspace">&nbsp;</span>Prerequisites</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.The_relationship_of_.Racket___.Pollen%29" class="toclink" data-pltdoc="x">5.2<span class="hspace">&nbsp;</span>The relationship of Racket &amp; Pollen</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Starting_a_new_file_in_.Dr.Racket%29" class="toclink" data-pltdoc="x">5.3<span class="hspace">&nbsp;</span>Starting a new file in DrRacket</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Setting_the__lang_line%29" class="toclink" data-pltdoc="x">5.3.1<span class="hspace">&nbsp;</span>Setting the <span class="stt">#lang</span> line</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Putting_in_the_text_of_the_poem%29" class="toclink" data-pltdoc="x">5.3.2<span class="hspace">&nbsp;</span>Putting in the text of the poem</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Saving___naming_your_source_file%29" class="toclink" data-pltdoc="x">5.3.3<span class="hspace">&nbsp;</span>Saving &amp; naming your source file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Using_the_project_server%29" class="toclink" data-pltdoc="x">5.4<span class="hspace">&nbsp;</span>Using the project server</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Starting_the_project_server_with_raco_pollen%29" class="toclink" data-pltdoc="x">5.4.1<span class="hspace">&nbsp;</span>Starting the project server with <span class="stt">raco pollen</span></a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Using_the_dashboard%29" class="toclink" data-pltdoc="x">5.4.2<span class="hspace">&nbsp;</span>Using the dashboard</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Source_files_in_the_dashboard%29" class="toclink" data-pltdoc="x">5.4.3<span class="hspace">&nbsp;</span>Source files in the dashboard</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Working_with_the_preprocessor%29" class="toclink" data-pltdoc="x">5.5<span class="hspace">&nbsp;</span>Working with the preprocessor</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Setting_up_a_preprocessor_source_file%29" class="toclink" data-pltdoc="x">5.5.1<span class="hspace">&nbsp;</span>Setting up a preprocessor source file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Creating_valid_.H.T.M.L_output%29" class="toclink" data-pltdoc="x">5.5.2<span class="hspace">&nbsp;</span>Creating valid HTML output</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Adding_commands%29" class="toclink" data-pltdoc="x">5.5.3<span class="hspace">&nbsp;</span>Adding commands</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Racket_basics__if_you_re_not_familiar_%29" class="toclink" data-pltdoc="x">5.5.4<span class="hspace">&nbsp;</span>Racket basics (if you&rsquo;re not familiar)</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Defining_variables_with_commands%29" class="toclink" data-pltdoc="x">5.5.5<span class="hspace">&nbsp;</span>Defining variables with commands</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Inserting_values_from_variables%29" class="toclink" data-pltdoc="x">5.5.6<span class="hspace">&nbsp;</span>Inserting values from variables</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.Inserting_variables_within_.C.S.S%29" class="toclink" data-pltdoc="x">5.5.7<span class="hspace">&nbsp;</span>Inserting variables within CSS</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="first-tutorial.html#%28part._.First_tutorial_complete%29" class="toclink" data-pltdoc="x">5.6<span class="hspace">&nbsp;</span>First tutorial complete</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html" class="toptoclink" data-pltdoc="x">6<span class="hspace">&nbsp;</span>Second tutorial</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Prerequisites%29" class="toclink" data-pltdoc="x">6.1<span class="hspace">&nbsp;</span>Prerequisites</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._.Prelude__my_principled_objection_to_.Markdown%29" class="toclink" data-pltdoc="x">6.2<span class="hspace">&nbsp;</span>Prelude: my principled objection to Markdown</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._.Markdown_in_.Pollen__two_options%29" class="toclink" data-pltdoc="x">6.3<span class="hspace">&nbsp;</span>Markdown in Pollen: two options</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._.Using_.Markdown_with_the_preprocessor%29" class="toclink" data-pltdoc="x">6.3.1<span class="hspace">&nbsp;</span>Using Markdown with the preprocessor</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._.Authoring_mode%29" class="toclink" data-pltdoc="x">6.3.2<span class="hspace">&nbsp;</span>Authoring mode</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._.X-expressions%29" class="toclink" data-pltdoc="x">6.3.3<span class="hspace">&nbsp;</span>X-expressions</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._.Markdown_authoring_mode%29" class="toclink" data-pltdoc="x">6.3.4<span class="hspace">&nbsp;</span>Markdown authoring mode</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Templates%29" class="toclink" data-pltdoc="x">6.4<span class="hspace">&nbsp;</span>Templates</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.The_-_html_function_and_the_doc_variable%29" class="toclink" data-pltdoc="x">6.4.1<span class="hspace">&nbsp;</span>The <span class="stt">-&gt;html</span> function and the <span class="stt">doc</span> variable</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Making_a_custom_template%29" class="toclink" data-pltdoc="x">6.4.2<span class="hspace">&nbsp;</span>Making a custom template</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Inserting_specific_source_data_into_templates%29" class="toclink" data-pltdoc="x">6.4.3<span class="hspace">&nbsp;</span>Inserting specific source data into templates</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Linking_to_an_external_.C.S.S_file%29" class="toclink" data-pltdoc="x">6.4.4<span class="hspace">&nbsp;</span>Linking to an external CSS file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Intermission%29" class="toclink" data-pltdoc="x">6.5<span class="hspace">&nbsp;</span>Intermission</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Pagetrees%29" class="toclink" data-pltdoc="x">6.6<span class="hspace">&nbsp;</span>Pagetrees</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Pagetree_navigation%29" class="toclink" data-pltdoc="x">6.6.1<span class="hspace">&nbsp;</span>Pagetree navigation</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Using_the_automatic_pagetree%29" class="toclink" data-pltdoc="x">6.6.2<span class="hspace">&nbsp;</span>Using the automatic pagetree</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Adding_navigation_links_to_the_template_with_here%29" class="toclink" data-pltdoc="x">6.6.3<span class="hspace">&nbsp;</span>Adding navigation links to the template with <span class="stt">here</span></a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Handling_navigation_boundaries_with_conditionals%29" class="toclink" data-pltdoc="x">6.6.4<span class="hspace">&nbsp;</span>Handling navigation boundaries with conditionals</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._.Making_a_pagetree_file%29" class="toclink" data-pltdoc="x">6.6.5<span class="hspace">&nbsp;</span>Making a&#160;pagetree file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._tutorial-2._index_ptree___the_project_server%29" class="toclink" data-pltdoc="x">6.6.6<span class="hspace">&nbsp;</span><span class="stt">index.ptree</span> &amp; the project server</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="second-tutorial.html#%28part._.Second_tutorial_complete%29" class="toclink" data-pltdoc="x">6.7<span class="hspace">&nbsp;</span>Second tutorial complete</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="raco-pollen.html" class="toptoclink" data-pltdoc="x">7<span class="hspace">&nbsp;</span>Using <span class="stt">raco pollen</span></a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="raco-pollen.html#%28part._.Making_sure_raco_pollen_works%29" class="toclink" data-pltdoc="x">7.1<span class="hspace">&nbsp;</span>Making sure <span class="RktSym">raco</span><span class="stt"> </span><span class="RktSym">pollen</span> works</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="raco-pollen.html#%28part._raco_pollen%29" class="toclink" data-pltdoc="x">7.2<span class="hspace">&nbsp;</span><span class="RktSym">raco</span><span class="stt"> </span><span class="RktSym">pollen</span></a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="raco-pollen.html#%28part._raco_pollen_help%29" class="toclink" data-pltdoc="x">7.3<span class="hspace">&nbsp;</span><span class="RktSym">raco</span><span class="stt"> </span><span class="RktSym">pollen</span><span class="stt"> </span><span class="RktSym">help</span></a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="raco-pollen.html#%28part._raco_pollen_start%29" class="toclink" data-pltdoc="x">7.4<span class="hspace">&nbsp;</span><span class="RktSym">raco</span><span class="stt"> </span><span class="RktSym">pollen</span><span class="stt"> </span><span class="RktSym">start</span></a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="raco-pollen.html#%28part._raco_pollen_render%29" class="toclink" data-pltdoc="x">7.5<span class="hspace">&nbsp;</span><span class="RktSym">raco</span><span class="stt"> </span><span class="RktSym">pollen</span><span class="stt"> </span><span class="RktSym">render</span></a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="raco-pollen.html#%28part._raco_pollen_clone%29" class="toclink" data-pltdoc="x">7.6<span class="hspace">&nbsp;</span><span class="RktSym">raco</span><span class="stt"> </span><span class="RktSym">pollen</span><span class="stt"> </span><span class="RktSym">clone</span></a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html" class="toptoclink" data-pltdoc="x">8<span class="hspace">&nbsp;</span>File formats</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Source_formats%29" class="toclink" data-pltdoc="x">8.1<span class="hspace">&nbsp;</span>Source formats</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Command_syntax_using__%29" class="toclink" data-pltdoc="x">8.1.1<span class="hspace">&nbsp;</span>Command syntax using &#9674;</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Any_command_is_valid%29" class="toclink" data-pltdoc="x">8.1.2<span class="hspace">&nbsp;</span>Any command is valid</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Standard_exports%29" class="toclink" data-pltdoc="x">8.1.3<span class="hspace">&nbsp;</span>Standard exports</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Custom_exports%29" class="toclink" data-pltdoc="x">8.1.4<span class="hspace">&nbsp;</span>Custom exports</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.The_project-require_rkt_file%29" class="toclink" data-pltdoc="x">8.1.5<span class="hspace">&nbsp;</span>The <span class="RktSym">project-require.rkt</span><span class="RktMeta"></span> file</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Preprocessor___pp_extension_%29" class="toclink" data-pltdoc="x">8.1.6<span class="hspace">&nbsp;</span>Preprocessor (.pp extension)</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Markdown___pmd_extension_%29" class="toclink" data-pltdoc="x">8.1.7<span class="hspace">&nbsp;</span>Markdown (.pmd extension)</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Markup___pm_extension_%29" class="toclink" data-pltdoc="x">8.1.8<span class="hspace">&nbsp;</span>Markup (.pm extension)</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Pagetree____ptree_extension_%29" class="toclink" data-pltdoc="x">8.1.9<span class="hspace">&nbsp;</span>Pagetree (.ptree extension)</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Utility_formats%29" class="toclink" data-pltdoc="x">8.2<span class="hspace">&nbsp;</span>Utility formats</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Scribble____scrbl_extension_%29" class="toclink" data-pltdoc="x">8.2.1<span class="hspace">&nbsp;</span>Scribble (.scrbl extension)</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="File_formats.html#%28part._.Null___p_extension_%29" class="toclink" data-pltdoc="x">8.2.2<span class="hspace">&nbsp;</span>Null (.p extension)</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html" class="toptoclink" data-pltdoc="x">9<span class="hspace">&nbsp;</span>&#9674; command overview</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.The_golden_rule%29" class="toclink" data-pltdoc="x">9.1<span class="hspace">&nbsp;</span>The golden rule</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.The_lozenge_glyph____%29" class="toclink" data-pltdoc="x">9.2<span class="hspace">&nbsp;</span>The lozenge glyph (&#9674;)</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.The_two_command_modes__text_mode___.Racket_mode%29" class="toclink" data-pltdoc="x">9.3<span class="hspace">&nbsp;</span>The two command modes: text mode &amp; Racket mode</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.The_command_name%29" class="toclink" data-pltdoc="x">9.3.1<span class="hspace">&nbsp;</span>The command name</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.Invoking_tag_functions%29" class="toclink" data-pltdoc="x">9.3.1.1<span class="hspace">&nbsp;</span>Invoking tag functions</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.Invoking_other_functions%29" class="toclink" data-pltdoc="x">9.3.1.2<span class="hspace">&nbsp;</span>Invoking other functions</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.Inserting_the_value_of_a_variable%29" class="toclink" data-pltdoc="x">9.3.1.3<span class="hspace">&nbsp;</span>Inserting the value of a variable</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.Inserting_a_comment%29" class="toclink" data-pltdoc="x">9.3.1.4<span class="hspace">&nbsp;</span>Inserting a comment</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.The_.Racket_arguments%29" class="toclink" data-pltdoc="x">9.3.2<span class="hspace">&nbsp;</span>The Racket arguments</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.The_text_argument%29" class="toclink" data-pltdoc="x">9.3.3<span class="hspace">&nbsp;</span>The text argument</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="reader.html#%28part._.Further_reading%29" class="toclink" data-pltdoc="x">9.4<span class="hspace">&nbsp;</span>Further reading</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Module_reference.html" class="toptoclink" data-pltdoc="x">10<span class="hspace">&nbsp;</span>Module reference</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Cache.html" class="toclink" data-pltdoc="x">10.1<span class="hspace">&nbsp;</span>Cache</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Decode.html" class="toclink" data-pltdoc="x">10.2<span class="hspace">&nbsp;</span>Decode</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Decode.html#%28part._.Block%29" class="toclink" data-pltdoc="x">10.2.1<span class="hspace">&nbsp;</span>Block</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Decode.html#%28part._.Typography%29" class="toclink" data-pltdoc="x">10.2.2<span class="hspace">&nbsp;</span>Typography</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="file-types.html" class="toclink" data-pltdoc="x">10.3<span class="hspace">&nbsp;</span>File</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Pagetree.html" class="toclink" data-pltdoc="x">10.4<span class="hspace">&nbsp;</span>Pagetree</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Pagetree.html#%28part._.Navigation%29" class="toclink" data-pltdoc="x">10.4.1<span class="hspace">&nbsp;</span>Navigation</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Pagetree.html#%28part._.Utilities%29" class="toclink" data-pltdoc="x">10.4.2<span class="hspace">&nbsp;</span>Utilities</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Render.html" class="toclink" data-pltdoc="x">10.5<span class="hspace">&nbsp;</span>Render</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Template.html" class="toclink" data-pltdoc="x">10.6<span class="hspace">&nbsp;</span>Template</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Tag.html" class="toclink" data-pltdoc="x">10.7<span class="hspace">&nbsp;</span>Tag</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Top.html" class="toclink" data-pltdoc="x">10.8<span class="hspace">&nbsp;</span>Top</a></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="World.html" class="toclink" data-pltdoc="x">10.9<span class="hspace">&nbsp;</span>World</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="Acknowledgments.html" class="toptoclink" data-pltdoc="x">11<span class="hspace">&nbsp;</span>Acknowledgments</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="License___source_code.html" class="toptoclink" data-pltdoc="x">12<span class="hspace">&nbsp;</span>License &amp; source code</a></p></td></tr><tr><td><p><span class="hspace"></span></p></td></tr><tr><td><p><span class="hspace">&nbsp;&nbsp;&nbsp;&nbsp;</span><a href="doc-index.html" class="toptoclink" data-pltdoc="x">Index</a></p></td></tr></table><div class="navsetbottom"><span class="navleft"><div class="nosearchform"></div>&nbsp;&nbsp;</span><span class="navright">&nbsp;&nbsp;<span class="nonavigation">&larr; prev</span>&nbsp;&nbsp;<span class="nonavigation">up</span>&nbsp;&nbsp;<a href="Installation.html" title="forward to &quot;1 Installation&quot;" data-pltdoc="x">next &rarr;</a></span>&nbsp;</div></div></div><div id="contextindicator">&nbsp;</div></body></html>