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<!-- SPDX-FileCopyrightText: 2025 Arthur A. Gleckler -->
<!-- SPDX-License-Identifier: MIT -->
<title>Hygienic ERR5RS Record Syntax (reduced)</title>
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<h1>SRFI 150: Hygienic ERR5RS Record Syntax (reduced)</h1>
<p class="authors">by Marc Nieper-Wißkirchen</p>
<p class="based-on"></p>
<p class="status">status: <em>final</em> (2018-01-16)</p>
<p class="keywords">keywords: <a href="https://srfi.schemers.org/?keywords=data-structure">Data Structure</a>, <a href="https://srfi.schemers.org/?keywords=record-type">Record Type</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>, <a href="/srfi-131/">SRFI 131: ERR5RS Record Syntax (reduced)</a>, <a href="/srfi-136/">SRFI 136: Extensible record types</a>, and <a href="/srfi-237/">SRFI 237: R6RS Records (refined)</a>.</span>
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<li><a href="srfi-150.html">The SRFI Document</a></li>
<li><a href="https://srfi-email.schemers.org/srfi-150/">Discussion Archive</a></li>
<li><a href="https://github.com/scheme-requests-for-implementation/srfi-150">Git repo (on GitHub)</a></li>
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<h2>Abstract</h2> <p> This SRFI provides a specification and portable implementation of an extension of the ERR5RS record syntax of <a href="https://srfi.schemers.org/srfi-131/srfi-131.html">SRFI 131</a>, where field names inserted by macro transformers are effectively renamed as if the macro transformer inserted a binding. This makes this SRFI compatible with the semantics of the record-type definitions of the <a href="https://bitbucket.org/cowan/r7rs/src/draft-10/rnrs/r7rs.pdf">R7RS</a> as intended by its <a href="https://groups.google.com/d/msg/scheme-reports-wg2/oKuhgwaM45w/KXgPrh8oAwAJ">authors</a>. In addition, field names may also be other types of Scheme datums, like numbers and strings, or <a href="https://srfi.schemers.org/srfi-88/srfi-88.html">SRFI 88</a> keyword objects.</body></html>