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docSidebarContainer_YfHR"><div class="sidebarViewport_aRkj"><div class="sidebar_njMd"><nav aria-label="Docs sidebar" class="menu thin-scrollbar menu_SIkG"><ul class="theme-doc-sidebar-menu menu__list"><li class="theme-doc-sidebar-item-link theme-doc-sidebar-item-link-level-1 menu__list-item"><a class="menu__link" href="../index.html">Introduction</a></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-0/intro.html">Contents and Figures</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-1/b-b-scope-purpose-and-history.html">1. Introduction</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-2/c-b-character-syntax.html">2. Syntax</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-3/d-b-evaluation.html">3. Evaluation and Compilation</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-4/e-b-introduction.html">4. Types and Classes</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-5/f-b-generalized-reference.html">5. Data and Control Flow</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-6/g-b-the-loop-facility.html">6. Iteration</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-7/h-b-object-creation-and-initialization.html">7. Objects</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../category/81-structures-dictionary.html">8. Structures</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-9/j-b-condition-system-concepts.html">9. Conditions</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-10/ba-b-symbol-concepts.html">10. Symbols</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-11/bb-b-package-concepts.html">11. Packages</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-12/bc-b-number-concepts.html">12. Numbers</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-13/bd-b-character-concepts.html">13. Characters</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-14/be-b-cons-concepts.html">14. Conses</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-15/bf-b-array-concepts.html">15. Arrays</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-16/bg-b-string-concepts.html">16. Strings</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-17/bh-b-sequence-concepts.html">17. Sequences</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-18/bi-b-hash-table-concepts.html">18. Hash Tables</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-19/bj-b-overview-of-filenames.html">19. Filenames</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-20/ca-b-file-system-concepts.html">20. Files</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-21/cb-b-stream-concepts.html">21. Streams</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-22/cc-b-the-lisp-printer.html">22. Printer</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-23/cd-b-reader-concepts.html">23. Reader</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-24/ce-b-system-construction-concepts.html">24. System Construction</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../chap-25/cf-b-the-external-environment.html">25. External Environment</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../environments.html">26. Environments</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../meta-object-protocol.html">27. Meta Object Protocol</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../data-structures.html">28. Data Structures</a></div></li><li class="theme-doc-sidebar-item-category theme-doc-sidebar-item-category-level-1 menu__list-item menu__list-item--collapsed"><div class="menu__list-item-collapsible"><a class="menu__link menu__link--sublist menu__link--sublist-caret" aria-expanded="false" href="../portability/trivial-packages.html">29. 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<p><strong>valid array dimension</strong> <em>n.</em> a <span><i>fixnum</i></span> suitable for use as an <em>array dimension</em>.</p>
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<p>Such a <span><i>fixnum</i></span> must be greater than or equal to zero, and less than the <span><i>value</i></span> of <span><b>array-dimension-limit</b></span>. When multiple <em>array dimensions</em> are to be used together to specify a multi-dimensional <span><i>array</i></span>, there is also an implied constraint that the product of all of the <span><i>dimensions</i></span> be less than the <span><i>value</i></span> of <span><b>array-total-size-limit</b></span>.</p>
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<p><strong>valid array index</strong> <em>n.</em> (of an <span><i>array</i></span>) a <span><i>fixnum</i></span> suitable for use as one of possibly several indices needed to name an <span><i>element</i></span> of the <span><i>array</i></span> according to a multi-dimensional Cartesian coordinate system. Such a <span><i>fixnum</i></span> must be greater than or equal to zero, and must be less than the corresponding <span><i>dimension</i></span><sub>1</sub> of the <span><i>array</i></span>. (Unless otherwise explicitly specified, the phrase “a <span><i>list</i></span> of <em>valid array indices</em>” further implies that the <span><i>length</i></span> of the <span><i>list</i></span> must be the same as the <span><i>rank</i></span> of the <span><i>array</i></span>.) “For a 2 by 3 array, valid array indices for the first dimension are 0 and 1, and valid array indices for the second dimension are 0, 1 and 2.”</p>
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<p><strong>valid array row-major index</strong> <em>n.</em> (of an <span><i>array</i></span>, which might have any number of <span><i>dimensions</i></span><sub>2</sub>) a single <span><i>fixnum</i></span> suitable for use in naming any <span><i>element</i></span> of the <span><i>array</i></span>, by viewing the array’s storage as a linear series of <span><i>elements</i></span> in row-major order. Such a <span><i>fixnum</i></span> must be greater than or equal to zero, and less than the <span><i>array total size</i></span> of the <span><i>array</i></span>.</p>
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<p><strong>valid fill pointer</strong> <em>n.</em> (of an <span><i>array</i></span>) a <span><i>fixnum</i></span> suitable for use as a <span><i>fill pointer</i></span> for the <span><i>array</i></span>. Such a <span><i>fixnum</i></span> must be greater than or equal to zero, and less than or equal to the <span><i>array total size</i></span> of the <span><i>array</i></span>.</p>
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<p><strong>valid logical pathname host</strong> <em>n.</em> a <span><i>string</i></span> that has been defined as the name of a <span><i>logical host</i></span>. See the <span><i>function</i></span> <strong>load-logical-pathname-translations</strong>.</p>
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<p><strong>valid pathname device</strong> <em>n.</em> a <span><i>string</i></span>, <span><b>nil</b></span>, <!-- -->:unspecific<!-- -->, or some other <span><i>object</i></span> defined by the <span><i>implementation</i></span> to be a <span><i>valid pathname device</i></span>.</p>
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<p><strong>valid pathname directory</strong> <em>n.</em> a <span><i>string</i></span>, a <span><i>list</i></span> of <span><i>strings</i></span>, <span><b>nil</b></span>, <!-- -->:wild<!-- -->, <!-- -->:unspecific<!-- -->, or some other <span><i>object</i></span> defined by the <span><i>implementation</i></span> to be a <em>valid directory component</em>.</p>
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<p><strong>valid pathname host</strong> <em>n.</em> a <span><i>valid physical pathname host</i></span> or a <span><i>valid logical pathname host</i></span>.</p>
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<p><strong>valid pathname name</strong> <em>n.</em> a <span><i>string</i></span>, <span><b>nil</b></span>, <!-- -->:wild<!-- -->, <!-- -->:unspecific<!-- -->, or some other <span><i>object</i></span> defined by the <span><i>implementation</i></span> to be a <span><i>valid pathname name</i></span>.</p>
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<p><strong>valid pathname type</strong> <em>n.</em> a <span><i>string</i></span>, <span><b>nil</b></span>, <!-- -->:wild<!-- -->, <!-- -->:unspecific<!-- -->.</p>
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<p><strong>valid pathname version</strong> <em>n.</em> a non-negative <em>integer</em> , or one of <!-- -->:wild<!-- -->, <!-- -->:newest<!-- -->,</p>
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<p>:unspecific<!-- -->, or <span><b>nil</b></span>. The symbols <!-- -->:oldest<!-- -->, <!-- -->:previous<!-- -->, and <!-- -->:installed<!-- --> are <em>semi</em></p>
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<p><em>standard</em> special version symbols.</p>
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<p><strong>valid physical pathname host</strong> <em>n.</em> any of a <span><i>string</i></span>, a <span><i>list</i></span> of <span><i>strings</i></span>, or the symbol <!-- -->:unspecific<!-- -->, that is recognized by the implementation as the name of a host.</p>
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<p><strong>valid sequence index</strong> <em>n.</em> (of a <em>sequence</em>) an <em>integer</em> suitable for use to name an <span><i>element</i></span> of the <em>sequence</em>. Such an <em>integer</em> must be greater than or equal to zero, and must be less than the <span><i>length</i></span> of the <em>sequence</em>. (If the <em>sequence</em> is an <span><i>array</i></span>, the <span><i>valid sequence index</i></span> is further constrained to be a <span><i>fixnum</i></span>.)</p>
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<p><strong>value</strong> <em>n.</em> 1. a. one of possibly several <span><i>objects</i></span> that are the result of an <span><i>evaluation</i></span>. b. (in a situation where exactly one value is expected from the <span><i>evaluation</i></span> of a <span><i>form</i></span>) the <span><i>primary value</i></span> returned by the <span><i>form</i></span>. c. (of <span><i>forms</i></span> in an <span><i>implicit progn</i></span>) one of possibly</p>
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<p>several <span><i>objects</i></span> that result from the <span><i>evaluation</i></span> of the last <span><i>form</i></span>, or <span><b>nil</b></span> if there are no <span><i>forms</i></span>. 2. an <span><i>object</i></span> associated with a <span><i>name</i></span> in a <span><i>binding</i></span>. 3. (of a <span><i>symbol</i></span>) the <span><i>value</i></span> of the <span><i>dynamic variable</i></span> named by that symbol. 4. an <span><i>object</i></span> associated with a <span><i>key</i></span> in an <span><i>association list</i></span>, a <span><i>property list</i></span>, or a <span><i>hash table</i></span>.</p>
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<p><strong>value cell</strong> <em>n. Trad.</em> (of a <span><i>symbol</i></span>) The <span><i>place</i></span> which holds the <span><i>value</i></span>, if any, of the <span><i>dynamic variable</i></span> named by that <span><i>symbol</i></span>, and which is <em>accessed</em> by <span><b>symbol-value</b></span>. See <span><i>cell</i></span>.</p>
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<p><strong>variable</strong> <em>n.</em> a <span><i>binding</i></span> in the “variable” <span><i>namespace</i></span>. See Section 3.1.2.1.1 (Symbols as Forms).</p>
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<p><span><b>vector</b></span> <em>n.</em> a one-dimensional <span><i>array</i></span>.</p>
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<p><strong>vertical-bar</strong> <em>n.</em> the <span><i>standard character</i></span> that is called “vertical bar” (|). See Figure 2–5.</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/lisp-docs/cl-language-reference/tree/main/docs/chap-26/v.md" target="_blank" rel="noopener noreferrer" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"><span class="theme-last-updated">Last updated<!-- --> by <b>daninus14</b></span></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="u.html"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">U</div></a><a 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