How to highlight the XML code in latex overleaf

Question

I followed few answers mentioned here to highlight the XML content in my latex and tried to combine best things together from different answers but for some reason nothing is being highlighted in my XML? Can someone please help me how to make XML content in my latex to look appealing? I tried the following answer: https://tex.stackexchange.com/a/11134/226278

My XML is quite large and spans over 2-3 pages but now it's being displayed in a frame with line number so looks nice but none of the tags or strings is being highlighted except for some strings in the XML header. I would like to highlight the tags and strings in them so it would look nicer.

\usepackage{listings}
\usepackage{color}
\definecolor{gray}{rgb}{0.4,0.4,0.4}
\definecolor{darkblue}{rgb}{0.0,0.0,0.6}
\definecolor{cyan}{rgb}{0.0,0.6,0.6}
\usepackage[usenames,dvipsnames,svgnames,table]{xcolor}
\geometry{a4paper}

 \lstset{
        language=xml,
        tabsize=3,
        %frame=lines,
        caption=Bulk test data events for rail sector
        label=code:rail1,
        frame=shadowbox,
        xleftmargin=20pt,
        framexleftmargin=15pt,
        numbers=left,
        numberstyle=\tiny,
        numbersep=5pt,
        breaklines=true,
        showstringspaces=false,
        basicstyle=\footnotesize,
        basicstyle=\ttfamily,
        columns=fullflexible,
        showstringspaces=false,
        basicstyle=\ttfamily\footnotesize,
        morestring=[b]",
        moredelim=[s][\bfseries\color{Maroon}]{<}{\ },
        moredelim=[s][\bfseries\color{Maroon}]{</}{>},
        moredelim=[l][\bfseries\color{Maroon}]{/>},
        moredelim=[l][\bfseries\color{Maroon}]{>},
        morecomment=[s]{<?}{?>},
        morecomment=[s]{<!--}{-->},
        commentstyle=\color{DarkOliveGreen},
        stringstyle=\color{blue},
        identifierstyle=\color{red},
    }
    \lstinputlisting{pics/RailSector.xml}

For example this is my sample XML file which I want to highlight and present in the pics folder:

<?xml version="1.0"?>
<hello:mydocument>
  <manufacturing>court</manufacturing>
  <bend>grabbed</bend>
  <quick>613049078</quick>
  <am>
    <brief>-2019050644</brief>
    <judge>955087623.417459</judge>
    <birds>green</birds>
    <join>among</join>
    <slight>
      <box>loose</box>
      <butter>table</butter>
      <afternoon>good</afternoon>
      <suddenly>rear</suddenly>
      <kitchen>copper</kitchen>
      <locate>802538930</locate>
    </slight>
    <wagon>1157100273.040341</wagon>
  </am>
  <this>1903268890</this>
  <rule>-1380139207</rule>
</hello:mydocument>

Answer 1

After correcting two things in your MWE (adding \documentclass{article}, \begin{document}, and \end{document}) It seemed like nothing was being highlighted besides the first line of your text.

This is because everything was defined in one color (Maroon) while the comments (defined by <? ?>) were different.

changing the Maroon color did not make everything highlighted. For that you need to tell listings to look in the text by adding * in the lstset.

MWE:

\documentclass{article}
\usepackage{listings}
\usepackage[usenames,dvipsnames,svgnames,table]{xcolor}

 \lstset{
        language=xml,
        tabsize=3,
        %frame=lines,
        caption=Bulk test data events for rail sector
        label=code:rail1,
        frame=shadowbox,
        xleftmargin=20pt,
        framexleftmargin=15pt,
        numbers=left,
        numberstyle=\tiny,
        numbersep=5pt,
        breaklines=true,
        showstringspaces=false,
        basicstyle=\footnotesize,
        basicstyle=\ttfamily,
        columns=fullflexible,
        showstringspaces=false,
        basicstyle=\ttfamily\footnotesize,
        morestring=[b]",
        moredelim=*[s][\bfseries\color{Maroon}]{<}{\ },
        moredelim=*[s][\bfseries\color{blue}]{</}{>},
        moredelim=*[l][\bfseries\color{red}]{/>},
        moredelim=*[l][\bfseries\color{Maroon}]{>},
        morecomment=[s]{<?}{?>},
        morecomment=[s]{<!--}{-->},
        commentstyle=\color{DarkOliveGreen},
        stringstyle=\color{blue},
        identifierstyle=\color{red},
    }
    
\begin{document}
    \lstinputlisting{RailSector.xml}
\end{document}

As for the question in the comments. \lstset is the settings definition. You tell the package what language you're using and what the keywords highlights are.

You then can type the code using lstlisting environment or input it from file (as you did) using \lstinputlisting

Using lstlisting is considered better practice WHEN ASKING A QUESTION HERE because it allows us to see the entire code without jumping between files. Here's an example of a MWE with the code in lstlisting

\documentclass{article}
\usepackage{listings}
\usepackage[usenames,dvipsnames,svgnames,table]{xcolor}

 \lstset{
        language=xml,
        tabsize=3,
        morestring=[b]",
        moredelim=*[s][\bfseries\color{Maroon}]{<}{\ },
        moredelim=*[s][\bfseries\color{blue}]{</}{>},
        moredelim=*[l][\bfseries\color{red}]{/>},
        moredelim=*[l][\bfseries\color{Maroon}]{>},
        morecomment=[s]{<?}{?>},
        morecomment=[s]{<!--}{-->},
        commentstyle=\color{DarkOliveGreen},
        stringstyle=\color{blue},
        identifierstyle=\color{red},
    }
    
\begin{document}
    \begin{lstlisting}
<?xml version="1.0"?>
<hello:mydocument>
  <manufacturing>court</manufacturing>
  <bend>grabbed</bend>
  <quick>613049078</quick>
  <this>1903268890</this>
  <rule>-1380139207</rule>
</hello:mydocument>
    \end{lstlisting}
\end{document}