\documentclass[10pt,a4paper]{article}

% Packages
\usepackage{fancyhdr}           % For header and footer
\usepackage{multicol}           % Allows multicols in tables
\usepackage{tabularx}           % Intelligent column widths
\usepackage{tabulary}           % Used in header and footer
\usepackage{hhline}             % Border under tables
\usepackage{graphicx}           % For images
\usepackage{xcolor}             % For hex colours
%\usepackage[utf8x]{inputenc}    % For unicode character support
\usepackage[T1]{fontenc}        % Without this we get weird character replacements
\usepackage{colortbl}           % For coloured tables
\usepackage{setspace}           % For line height
\usepackage{lastpage}           % Needed for total page number
\usepackage{seqsplit}           % Splits long words.
%\usepackage{opensans}          % Can't make this work so far. Shame. Would be lovely.
\usepackage[normalem]{ulem}     % For underlining links
% Most of the following are not required for the majority
% of cheat sheets but are needed for some symbol support.
\usepackage{amsmath}            % Symbols
\usepackage{MnSymbol}           % Symbols
\usepackage{wasysym}            % Symbols
%\usepackage[english,german,french,spanish,italian]{babel}              % Languages

% Document Info
\author{PotatoCodes}
\pdfinfo{
  /Title (xml.pdf)
  /Creator (Cheatography)
  /Author (PotatoCodes)
  /Subject (Xml Cheat Sheet)
}

% Lengths and widths
\addtolength{\textwidth}{6cm}
\addtolength{\textheight}{-1cm}
\addtolength{\hoffset}{-3cm}
\addtolength{\voffset}{-2cm}
\setlength{\tabcolsep}{0.2cm} % Space between columns
\setlength{\headsep}{-12pt} % Reduce space between header and content
\setlength{\headheight}{85pt} % If less, LaTeX automatically increases it
\renewcommand{\footrulewidth}{0pt} % Remove footer line
\renewcommand{\headrulewidth}{0pt} % Remove header line
\renewcommand{\seqinsert}{\ifmmode\allowbreak\else\-\fi} % Hyphens in seqsplit
% This two commands together give roughly
% the right line height in the tables
\renewcommand{\arraystretch}{1.3}
\onehalfspacing

% Commands
\newcommand{\SetRowColor}[1]{\noalign{\gdef\RowColorName{#1}}\rowcolor{\RowColorName}} % Shortcut for row colour
\newcommand{\mymulticolumn}[3]{\multicolumn{#1}{>{\columncolor{\RowColorName}}#2}{#3}} % For coloured multi-cols
\newcolumntype{x}[1]{>{\raggedright}p{#1}} % New column types for ragged-right paragraph columns
\newcommand{\tn}{\tabularnewline} % Required as custom column type in use

% Font and Colours
\definecolor{HeadBackground}{HTML}{333333}
\definecolor{FootBackground}{HTML}{666666}
\definecolor{TextColor}{HTML}{333333}
\definecolor{DarkBackground}{HTML}{51DBA4}
\definecolor{LightBackground}{HTML}{F4FCF9}
\renewcommand{\familydefault}{\sfdefault}
\color{TextColor}

% Header and Footer
\pagestyle{fancy}
\fancyhead{} % Set header to blank
\fancyfoot{} % Set footer to blank
\fancyhead[L]{
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{C}
    \SetRowColor{DarkBackground}
    \vspace{-7pt}
    {\parbox{\dimexpr\textwidth-2\fboxsep\relax}{\noindent
        \hspace*{-6pt}\includegraphics[width=5.8cm]{/web/www.cheatography.com/public/images/cheatography_logo.pdf}}
    }
\end{tabulary}
\columnbreak
\begin{tabulary}{11cm}{L}
    \vspace{-2pt}\large{\bf{\textcolor{DarkBackground}{\textrm{Xml Cheat Sheet}}}} \\
    \normalsize{by \textcolor{DarkBackground}{PotatoCodes} via \textcolor{DarkBackground}{\uline{cheatography.com/205795/cs/44014/}}}
\end{tabulary}
\end{multicols}}

\fancyfoot[L]{ \footnotesize
\noindent
\begin{multicols}{3}
\begin{tabulary}{5.8cm}{LL}
  \SetRowColor{FootBackground}
  \mymulticolumn{2}{p{5.377cm}}{\bf\textcolor{white}{Cheatographer}}  \\
  \vspace{-2pt}PotatoCodes \\
  \uline{cheatography.com/potatocodes} \\
  \end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Cheat Sheet}}  \\
   \vspace{-2pt}Not Yet Published.\\
   Updated 3rd August, 2024.\\
   Page {\thepage} of \pageref{LastPage}.
\end{tabulary}
\vfill
\columnbreak
\begin{tabulary}{5.8cm}{L}
  \SetRowColor{FootBackground}
  \mymulticolumn{1}{p{5.377cm}}{\bf\textcolor{white}{Sponsor}}  \\
  \SetRowColor{white}
  \vspace{-5pt}
  %\includegraphics[width=48px,height=48px]{dave.jpeg}
  Measure your website readability!\\
  www.readability-score.com
\end{tabulary}
\end{multicols}}




\begin{document}
\raggedright
\raggedcolumns

% Set font size to small. Switch to any value
% from this page to resize cheat sheet text:
% www.emerson.emory.edu/services/latex/latex_169.html
\footnotesize % Small font.

\begin{multicols*}{2}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Syntax}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{\textless{}root\textgreater{}   \{\{nl\}\}~~\textless{}child\textgreater{}     \{\{nl\}\}~~~\textless{}subchild\textgreater{}.....\textless{}/subchild\textgreater{}   \{\{nl\}\}~~\textless{}/child\textgreater{} \{\{nl\}\}\textless{}/root\textgreater{}} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{\textless{}note\textgreater{}   \{\{nl\}\}~~\textless{}to\textgreater{}Tove\textless{}/to\textgreater{}\{\{nl\}\}~~   \textless{}from\textgreater{}Jani\textless{}/from\textgreater{}   \{\{nl\}\}~~\textless{}heading\textgreater{}Reminder\textless{}/heading\textgreater{}   \{\{nl\}\}~~\textless{}body\textgreater{}Don't forget me this weekend!\textless{}/body\textgreater{} \{\{nl\}\}\textless{}/note\textgreater{}} \tn 
% Row Count 8 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Commenting}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{\textless{}!-{}- This is a comment -{}-\textgreater{}} \tn 
% Row Count 1 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Prolog}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{\textless{}?xml version="1.0" encoding="UTF-8"?\textgreater{}} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{UTF-8 is the default character encoding for XML documents.} \tn 
% Row Count 3 (+ 2)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{The XML prolog is optional.} \tn 
% Row Count 4 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{p{1.12 cm} p{6.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Entity References}}  \tn
% Row 0
\SetRowColor{LightBackground}
\textless{} & \< \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\textgreater{} & \> \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\& & \& \tn 
% Row Count 3 (+ 1)
% Row 3
\SetRowColor{white}
' & \' \tn 
% Row Count 4 (+ 1)
% Row 4
\SetRowColor{LightBackground}
" & \" \tn 
% Row Count 5 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{4 cm} x{4 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{HttpRequest}}  \tn
% Row 0
\SetRowColor{LightBackground}
The first line in the example above creates an XMLHttpRequest object: & var xhttp = new XMLHttpRequest(); \tn 
% Row Count 4 (+ 4)
% Row 1
\SetRowColor{white}
The onreadystatechange property specifies a function to be executed every time the status of the XMLHttpRequest object changes: & \seqsplit{xhttp.onreadystatechange} = function() \tn 
% Row Count 11 (+ 7)
% Row 2
\SetRowColor{LightBackground}
When readyState property is 4 and the status property is 200, the response is ready: & if (this.readyState == 4 \&\& this.status == 200) \tn 
% Row Count 16 (+ 5)
% Row 3
\SetRowColor{white}
The responseText property returns the server response as a text string.The text string can be used to update a web page: & \seqsplit{document.getElementById("demo").innerHTML} = xhttp.responseText; \tn 
% Row Count 22 (+ 6)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{var xhttp = new XMLHttpRequest(); \newline xhttp.onreadystatechange = function() \{ \newline     \{\{nl\}\}\{\{nl\}\}if (this.readyState == 4 \&\& this.status == 200) \{ \newline       \{\{nl\}\}\{\{nl\}\}\{\{nl\}\} // Typical action to be performed when the \{\{nl\}\}\{\{nl\}\}document is ready: \newline        \seqsplit{document.getElementById("demo").innerHTML} = xhttp.responseText; \newline    \{\{nl\}\}\{\{nl\}\} \} \newline \}; \newline xhttp.open("GET", "filename", true); \newline xhttp.send();}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{X}
\SetRowColor{DarkBackground}
\mymulticolumn{1}{x{8.4cm}}{\bf\textcolor{white}{Element Naming}}  \tn
% Row 0
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Case-sensitive} \tn 
% Row Count 1 (+ 1)
% Row 1
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Must start with a letter or underscore} \tn 
% Row Count 2 (+ 1)
% Row 2
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Cannot start with the letters xml (or XML, or Xml, etc)} \tn 
% Row Count 4 (+ 2)
% Row 3
\SetRowColor{white}
\mymulticolumn{1}{x{8.4cm}}{Can contain letters, digits, hyphens, underscores, and periods} \tn 
% Row Count 6 (+ 2)
% Row 4
\SetRowColor{LightBackground}
\mymulticolumn{1}{x{8.4cm}}{Cannot contain spaces} \tn 
% Row Count 7 (+ 1)
\hhline{>{\arrayrulecolor{DarkBackground}}-}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{2.96 cm} x{5.04 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Element}}  \tn
% Row 0
\SetRowColor{LightBackground}
An element can contain: & -text \{\{nl\}\}-attributes \{\{nl\}\}-other elements \{\{nl\}\}-or a mix of the above \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
Empty Element & \textless{}element/\textgreater{} \tn 
% Row Count 4 (+ 1)
% Row 2
\SetRowColor{LightBackground}
Text Content & \textless{}title\textgreater{}, \textless{}author\textgreater{}, \textless{}year\textgreater{}, \textless{}price\textgreater{} contain text \tn 
% Row Count 6 (+ 2)
% Row 3
\SetRowColor{white}
element contents & \textless{}bookstore\textgreater{} and \textless{}book\textgreater{} \tn 
% Row Count 8 (+ 2)
% Row 4
\SetRowColor{LightBackground}
attribute & \textless{}book\textgreater{} has an attribute (category="children"). \tn 
% Row Count 10 (+ 2)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\SetRowColor{LightBackground}
\mymulticolumn{2}{x{8.4cm}}{Example: \newline \textless{}bookstore\textgreater{} \newline   ~\textless{}book category="children"\textgreater{} \newline     ~~\textless{}title\textgreater{}Harry Potter\textless{}/title\textgreater{} \newline     ~~\textless{}author\textgreater{}J K. Rowling\textless{}/author\textgreater{} \newline     ~~\textless{}year\textgreater{}2005\textless{}/year\textgreater{} \newline     ~~\textless{}price\textgreater{}29.99\textless{}/price\textgreater{} \newline   ~\textless{}/book\textgreater{} \newline   ~\textless{}book category="web"\textgreater{} \newline     ~~\textless{}title\textgreater{}Learning XML\textless{}/title\textgreater{} \newline     ~~\textless{}author\textgreater{}Erik T. Ray\textless{}/author\textgreater{} \newline     ~~\textless{}year\textgreater{}2003\textless{}/year\textgreater{} \newline     ~~\textless{}price\textgreater{}39.95\textless{}/price\textgreater{} \newline   ~\textless{}/book\textgreater{} \newline \textless{}/bookstore\textgreater{}}  \tn 
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.12 cm} x{4.88 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Attributes}}  \tn
% Row 0
\SetRowColor{LightBackground}
Must be quoted ' ' or " " & \textless{}person gender="female"\textgreater{} \{\{nl\}\}or \{\{nl\}\}\textless{}person gender='female'\textgreater{} \tn 
% Row Count 3 (+ 3)
% Row 1
\SetRowColor{white}
If contains quotues & \textless{}gangster name='George "Shotgun" Ziegler'\textgreater{} \{\{nl\}\}or \{\{nl\}\}\textless{}gangster name="George \"Shotgun\" Ziegler"\textgreater{} \tn 
% Row Count 8 (+ 5)
% Row 2
\SetRowColor{LightBackground}
Attributes cannot contain: & -multiple values (elements can)  \{\{nl\}\}- tree structures (elements can)  \{\{nl\}\}-are not easily expandable (for future changes) \tn 
% Row Count 14 (+ 6)
% Row 3
\SetRowColor{white}
ID referneces & \textless{}note id="501"\textgreater{} \{\{nl\}\}Can be used to idenmify xml elements \tn 
% Row Count 17 (+ 3)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}

\begin{tabularx}{8.4cm}{x{3.36 cm} x{4.64 cm} }
\SetRowColor{DarkBackground}
\mymulticolumn{2}{x{8.4cm}}{\bf\textcolor{white}{Namespaces}}  \tn
% Row 0
\SetRowColor{LightBackground}
Fix name conflict with prefix & \textless{}h:table\textgreater{} and \textless{}f:table\textgreater{} \tn 
% Row Count 2 (+ 2)
% Row 1
\SetRowColor{white}
Xmlns defenition & \textless{}h:table xmlns:h="http://www.w3.org/TR/html4/"\textgreater{}\{\{nl\}\} or \{\{nl\}\}\textless{}root xmlns:h="http://www.w3.org/TR/html4/"\textgreater{} \tn 
% Row Count 7 (+ 5)
\hhline{>{\arrayrulecolor{DarkBackground}}--}
\end{tabularx}
\par\addvspace{1.3em}


% That's all folks
\end{multicols*}

\end{document}