\documentclass{article}
\usepackage[utf8]{inputenc}
\usepackage{syntax}
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\usepackage{subfiles}
\usepackage{datetime}

\usepackage{hyperref}
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\usepackage[backend=biber, hyperref=true, citestyle=authoryear]{biblatex}
\addbibresource{biblio.bib}

\title{Squiggle $\alpha$-v0.1 Specification (INTERNAL)}
\author{Quinn Dougherty - \texttt{quinn@quantifieduncertainty.org}}
\date{This render: \today}

\begin{document}
\maketitle{}

\nocite{*}
\subfile{introduction}
\subfile{syntax}
\subfile{semantics}
\subfile{appendix}
\printbibliography
\end{document}