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\begin{document}

\title{Conformance Relations between Input/Output Languages}
\author{Robert Sachtleben}
\maketitle

\begin{abstract}
	This entry formalises the paper of the same name by Huang et~al.~\cite{Huang2023} and presents a unifying characterisation of well-known conformance relations such as equivalence and language inclusion (reduction) on languages over input/output pairs.      
    This characterisation simplifies comparisons between conformance relations and from it a fundamental necessary and sufficient criterion for conformance testing is developed. 
\end{abstract}

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