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<!-- SPDX-FileCopyrightText: 2024 Arthur A. Gleckler -->
<!-- SPDX-License-Identifier: MIT -->
<title>Minimal extension to SRFI 9/R7RS small record type definitions for inheritance</title>
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<h1>SRFI 256: Minimal extension to SRFI 9/R7RS small record type definitions for inheritance</h1>
<p class="authors">by Daphne Preston-Kendal</p>
<p class="based-on"></p>
<p class="status">status: <em>draft</em> (2024-11-20)</p>
<p class="keywords">keywords: <a href="https://srfi.schemers.org/?keywords=data-structure">Data Structure</a></p><span class="see-also">See also <a href="/srfi-9/">SRFI 9: Defining Record Types</a>, <a href="/srfi-99/">SRFI 99: ERR5RS Records</a>, and <a href="/srfi-237/">SRFI 237: R6RS Records (refined)</a>.</span>
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<li><a href="srfi-256.html">The SRFI Document</a></li>
<li><a href="https://srfi-email.schemers.org/srfi-256/">Discussion Archive</a></li>
<li><a href="https://github.com/scheme-requests-for-implementation/srfi-256">Git repo (on GitHub)</a></li>
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<h2>Abstract</h2><p>A SRFI 9-style <code>define-record-type</code> is specified which allows subtyping while preserving encapsulation, in that the field structure of supertypes remains an implementation detail with which subtypes need not concern themselves.</body></html>