This heading explains the working of tasks or instructions that you have just completed.

You will also find some other learning aids in the book, including:

These are short multiple choice questions intended to help you test your own understanding.

These set practical challenges and give you ideas for experimenting with what you have learned.

You will also find a number of styles of text that distinguish between different kinds of information. Here are some examples of these styles, and an explanation of their meaning.

Code words in text are shown as follows: "We can include other contexts through the use of the include directive."

A block of code is set as follows:

# searchd options (used by search daemon)
searchd
{
listen = 9312
log = /usr/local/sphinx/var/log/searchd.log
query_log = /usr/local/sphinx/var/log/query.log
max_children = 30
pid_file = /usr/local/sphinx/var/log/searchd.pid
}

When we wish to draw your attention to a particular part of a code block, the relevant lines or items are set in bold:

source blog {
# source options
}
index posts {
# index options
}

Any command-line input or output is written as follows:

$ mkdir /path/to/your/webroot/sphinx

New terms and important words are shown in bold. Words that you see on the screen, in menus or dialog boxes for example, appear in the text like this: "clicking on the Next button moves you to the next screen".