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<!DOCTYPE html>
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<title>Mappings</title>
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<h1>SRFI 146: Mappings</h1>
<p class="authors">by Arthur A. Gleckler and Marc Nieper-Wißkirchen</p>
<p class="based-on"></p>
<p class="status">status: <em>final</em> (2018-05-24)</p>
<p class="keywords">keywords: <a href="https://srfi.schemers.org/?keywords=data-structure">Data Structure</a>, <a href="https://srfi.schemers.org/?keywords=r7rs-large">R7RS Large</a>, <a href="https://srfi.schemers.org/?keywords=r7rs-large-tangerine">R7RS Large: Tangerine Edition</a></p><span class="see-also">See also <a href="/srfi-224/">SRFI 224: Integer Mappings</a>.</span>
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<h2>Abstract</h2> <p><em>Mappings</em> are finite sets of
associations, where each association is a pair consisting of a key and an
arbitrary Scheme value. The keys are elements of a suitable domain. Each
mapping holds no more than one association with the same key. The
fundamental mapping operation is retrieving the value of an association
stored in the mapping when the key is given.</body></html>