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    <title>Obr Language Reference Manual</title>
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    <h1>Department of Computing, Macquarie University</h1>
    <h2>Obr Language Reference Manual</h2>

    Obr is a simple imperative language modelled on the Oberon family
    of languages designed by Niklaus Wirth.
    This document provides background information needed to understand
    the semantics of the language.<p>

    The document has five subsections, each dealing 