    html_chunked
        framework: twitter_bootstrap
        ...
&nbsp;
    my_website2:
        extends:   my_website1
        framework: 960_gs</pre>
</div>

<p>This new option is now available in any template through the following expression: <code>{{ edition.framework }}</code>. Finally, you can also add new options to the contents of the book.  Do you want to indicate the estimated reading time in each chapter? Add the following <code>time</code> option for <code>chapter</code> elements:</p>

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