Include link to relative / ordinal diagram source

docs/user/README.md

@@ -185,6 +185,7 @@ We support several modifiers that allow you to refer to scopes relative to the i
 Here is a diagram of the possible relative / ordinal modifiers:
 
 ![Relative ordinal diagram](images/relative_ordinal.png)
+([Image source](images/relative_ordinal.tex))
 
 And here is a table of the spoken forms:
 

docs/user/images/relative_ordinal.tex

@@ -0,0 +1,48 @@
+\documentclass[tikz]{standalone}
+\usepackage{tikz}
+\usetikzlibrary{decorations.pathreplacing}
+
+% To build:
+% pdflatex relative_ordinal.tex
+% convert -density 300 relative_ordinal.pdf -quality 100 -background white -alpha remove relative_ordinal.png
+
+\begin{document}
+\def\spacing{1.4cm}
+\newcommand{\abrace}[4]{
+    \draw [decorate, decoration = {brace, amplitude=5pt}] (#2*\spacing, #1*0.8cm + 0.5cm) --  (#3*\spacing, #1*0.8cm + 0.5cm)
+    node[above=5pt, pos=0.5, scale=0.8] {\texttt{"#4"}};
+}
+\newcommand{\bbrace}[4]{
+    \draw [decorate, decoration ={brace, amplitude=5pt}] (#2*\spacing, #1*0.8cm + 0.5cm) --  (#3*\spacing, #1*0.8cm + 0.5cm)
+    node[above=-20pt, pos=0.5, scale=0.8] {#4};
+}
+\newcommand{\funk}[2]{
+    \draw[fill=black] (#1*\spacing,0) circle (0.1cm) node[below=3pt, text width=1cm,align=left,scale=0.7] (F#1)
+    {\texttt{"#2"}};
+}
+\begin{tikzpicture}[ultra thick]
+
+\funk{0}{first funk}
+\funk{1}{second funk}
+\funk{2}{third previous funk}
+\funk{3}{second previous funk}
+\funk{4}{previous funk}
+\funk{5}{funk}
+\funk{6}{next funk}
+\funk{7}{second next funk}
+\funk{8}{third next funk}
+\funk{9}{second last funk}
+\funk{10}{last funk}
+
+\draw[latex-] (F5) -- +(0,-0.8cm) node[below=2pt,scale=0.8] {input target};
+
+\abrace{0}{6}{8}{next three funks};
+\abrace{0}{2}{4}{previous three funks};
+\abrace{1}{5}{7}{three funks};
+\abrace{2}{3}{5}{three funks backward};
+\abrace{0}{0}{1}{first two funks};
+\abrace{0}{9}{10}{last two funks};
+\bbrace{-3}{10}{0}{iteration scope};
+\end{tikzpicture}
+
+\end{document}