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class="vector-pinned-container"> </div> </nav> </div> </div> <div class="vector-sticky-pinned-container"> <nav id="mw-panel-toc" aria-label="Conteúdo" data-event-name="ui.sidebar-toc" class="mw-table-of-contents-container vector-toc-landmark"> <div id="vector-toc-pinned-container" class="vector-pinned-container"> <div id="vector-toc" class="vector-toc vector-pinnable-element"> <div class="vector-pinnable-header vector-toc-pinnable-header vector-pinnable-header-pinned" data-feature-name="toc-pinned" data-pinnable-element-id="vector-toc" > <h2 class="vector-pinnable-header-label">Conteúdo</h2> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-toc.pin">mover para a barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-toc.unpin">ocultar</button> </div> <ul class="vector-toc-contents" id="mw-panel-toc-list"> <li id="toc-mw-content-text" class="vector-toc-list-item vector-toc-level-1"> <a href="#" class="vector-toc-link"> <div class="vector-toc-text">Início</div> </a> </li> <li id="toc-Esforços_para_modernização" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Esforços_para_modernização"> <div class="vector-toc-text"> <span class="vector-toc-numb">1</span> <span>Esforços para modernização</span> </div> </a> <ul id="toc-Esforços_para_modernização-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Informação_de_firewall" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Informação_de_firewall"> <div class="vector-toc-text"> <span class="vector-toc-numb">2</span> <span>Informação de firewall</span> </div> </a> <ul id="toc-Informação_de_firewall-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ver_também" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ver_também"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Ver também</span> </div> </a> <ul id="toc-Ver_também-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Ligações_externas" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Ligações_externas"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Ligações externas</span> </div> </a> <button aria-controls="toc-Ligações_externas-sublist" class="cdx-button cdx-button--weight-quiet cdx-button--icon-only vector-toc-toggle"> <span class="vector-icon mw-ui-icon-wikimedia-expand"></span> <span>Alternar a subsecção Ligações externas</span> </button> <ul id="toc-Ligações_externas-sublist" class="vector-toc-list"> <li id="toc-Software" class="vector-toc-list-item vector-toc-level-2"> <a class="vector-toc-link" href="#Software"> <div class="vector-toc-text"> <span class="vector-toc-numb">4.1</span> <span>Software</span> </div> </a> <ul id="toc-Software-sublist" class="vector-toc-list"> </ul> </li> </ul> </li> <li id="toc-Referências" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Referências"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Referências</span> </div> </a> <ul id="toc-Referências-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Conteúdo" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Alternar o índice" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Alternar o índice</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Z39.50</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ir para um artigo noutra língua. Disponível em 18 línguas" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-18" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">18 línguas</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D8%A8%D8%B1%D9%88%D8%AA%D9%88%D9%83%D9%88%D9%84_Z39.50" title="بروتوكول Z39.50 — árabe" lang="ar" hreflang="ar" data-title="بروتوكول Z39.50" data-language-autonym="العربية" data-language-local-name="árabe" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-ca mw-list-item"><a href="https://ca.wikipedia.org/wiki/Z39.50" title="Z39.50 — catalão" lang="ca" hreflang="ca" data-title="Z39.50" data-language-autonym="Català" data-language-local-name="catalão" class="interlanguage-link-target"><span>Català</span></a></li><li class="interlanguage-link interwiki-cs mw-list-item"><a href="https://cs.wikipedia.org/wiki/Z39.50" title="Z39.50 — checo" lang="cs" hreflang="cs" data-title="Z39.50" data-language-autonym="Čeština" data-language-local-name="checo" class="interlanguage-link-target"><span>Čeština</span></a></li><li class="interlanguage-link interwiki-da mw-list-item"><a href="https://da.wikipedia.org/wiki/Z39.50" title="Z39.50 — dinamarquês" lang="da" hreflang="da" data-title="Z39.50" data-language-autonym="Dansk" data-language-local-name="dinamarquês" class="interlanguage-link-target"><span>Dansk</span></a></li><li class="interlanguage-link interwiki-de mw-list-item"><a href="https://de.wikipedia.org/wiki/Z39.50" title="Z39.50 — alemão" lang="de" hreflang="de" data-title="Z39.50" data-language-autonym="Deutsch" data-language-local-name="alemão" class="interlanguage-link-target"><span>Deutsch</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Z39.50" title="Z39.50 — inglês" lang="en" hreflang="en" data-title="Z39.50" data-language-autonym="English" data-language-local-name="inglês" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-es mw-list-item"><a href="https://es.wikipedia.org/wiki/Z39.50" title="Z39.50 — espanhol" lang="es" hreflang="es" data-title="Z39.50" data-language-autonym="Español" data-language-local-name="espanhol" class="interlanguage-link-target"><span>Español</span></a></li><li class="interlanguage-link interwiki-fa mw-list-item"><a href="https://fa.wikipedia.org/wiki/%D9%BE%D8%B1%D9%88%D8%AA%DA%A9%D9%84_%D8%B2%D8%AF%DB%B3%DB%B9%D9%AB%DB%B5%DB%B0" title="پروتکل زد۳۹٫۵۰ — persa" lang="fa" hreflang="fa" data-title="پروتکل زد۳۹٫۵۰" data-language-autonym="فارسی" data-language-local-name="persa" class="interlanguage-link-target"><span>فارسی</span></a></li><li class="interlanguage-link interwiki-fr mw-list-item"><a href="https://fr.wikipedia.org/wiki/Z39.50" title="Z39.50 — francês" lang="fr" hreflang="fr" data-title="Z39.50" data-language-autonym="Français" data-language-local-name="francês" class="interlanguage-link-target"><span>Français</span></a></li><li class="interlanguage-link interwiki-he mw-list-item"><a href="https://he.wikipedia.org/wiki/Z39.50" title="Z39.50 — hebraico" lang="he" hreflang="he" data-title="Z39.50" data-language-autonym="עברית" data-language-local-name="hebraico" class="interlanguage-link-target"><span>עברית</span></a></li><li class="interlanguage-link interwiki-hu mw-list-item"><a href="https://hu.wikipedia.org/wiki/Z39.50_protokoll" title="Z39.50 protokoll — húngaro" lang="hu" hreflang="hu" data-title="Z39.50 protokoll" data-language-autonym="Magyar" data-language-local-name="húngaro" class="interlanguage-link-target"><span>Magyar</span></a></li><li class="interlanguage-link interwiki-it mw-list-item"><a href="https://it.wikipedia.org/wiki/Z39.50" title="Z39.50 — italiano" lang="it" hreflang="it" data-title="Z39.50" data-language-autonym="Italiano" data-language-local-name="italiano" class="interlanguage-link-target"><span>Italiano</span></a></li><li class="interlanguage-link interwiki-ja mw-list-item"><a href="https://ja.wikipedia.org/wiki/Z39.50" title="Z39.50 — japonês" lang="ja" hreflang="ja" data-title="Z39.50" data-language-autonym="日本語" data-language-local-name="japonês" class="interlanguage-link-target"><span>日本語</span></a></li><li class="interlanguage-link interwiki-ko mw-list-item"><a href="https://ko.wikipedia.org/wiki/Z39.50" title="Z39.50 — coreano" lang="ko" hreflang="ko" data-title="Z39.50" data-language-autonym="한국어" data-language-local-name="coreano" class="interlanguage-link-target"><span>한국어</span></a></li><li class="interlanguage-link interwiki-pl mw-list-item"><a href="https://pl.wikipedia.org/wiki/Z39.50" title="Z39.50 — polaco" lang="pl" hreflang="pl" data-title="Z39.50" data-language-autonym="Polski" data-language-local-name="polaco" class="interlanguage-link-target"><span>Polski</span></a></li><li class="interlanguage-link interwiki-ru mw-list-item"><a href="https://ru.wikipedia.org/wiki/Z39.50" title="Z39.50 — russo" lang="ru" hreflang="ru" data-title="Z39.50" data-language-autonym="Русский" data-language-local-name="russo" class="interlanguage-link-target"><span>Русский</span></a></li><li class="interlanguage-link interwiki-sr mw-list-item"><a href="https://sr.wikipedia.org/wiki/Z39.50" title="Z39.50 — sérvio" lang="sr" hreflang="sr" data-title="Z39.50" data-language-autonym="Српски / srpski" data-language-local-name="sérvio" class="interlanguage-link-target"><span>Српски / srpski</span></a></li><li class="interlanguage-link interwiki-uk mw-list-item"><a href="https://uk.wikipedia.org/wiki/Z39.50" title="Z39.50 — ucraniano" lang="uk" hreflang="uk" data-title="Z39.50" data-language-autonym="Українська" data-language-local-name="ucraniano" class="interlanguage-link-target"><span>Українська</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q135847#sitelinks-wikipedia" title="Editar hiperligações interlínguas" class="wbc-editpage">Editar hiperligações</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Espaços nominais"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Z39.50" title="Ver a página de conteúdo [c]" accesskey="c"><span>Artigo</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Discuss%C3%A3o:Z39.50&action=edit&redlink=1" rel="discussion" class="new" title="Discussão sobre o conteúdo da página (página não existe) [t]" accesskey="t"><span>Discussão</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Mudar a variante da língua" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">português</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Vistas"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Z39.50"><span>Ler</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Z39.50&veaction=edit" title="Editar esta página [v]" accesskey="v"><span>Editar</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Z39.50&action=edit" title="Editar o código-fonte desta página [e]" accesskey="e"><span>Editar código-fonte</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Z39.50&action=history" title="Edições anteriores desta página. [h]" accesskey="h"><span>Ver histórico</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Ferramentas de página"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Ferramentas" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Ferramentas</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Ferramentas</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">mover para a barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">ocultar</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Mais opções" > <div class="vector-menu-heading"> Operações </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected vector-more-collapsible-item mw-list-item"><a href="/wiki/Z39.50"><span>Ler</span></a></li><li id="ca-more-ve-edit" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Z39.50&veaction=edit" title="Editar esta página [v]" accesskey="v"><span>Editar</span></a></li><li id="ca-more-edit" class="collapsible vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Z39.50&action=edit" title="Editar o código-fonte desta página [e]" accesskey="e"><span>Editar código-fonte</span></a></li><li id="ca-more-history" class="vector-more-collapsible-item mw-list-item"><a href="/w/index.php?title=Z39.50&action=history"><span>Ver histórico</span></a></li> </ul> </div> </div> <div id="p-tb" class="vector-menu mw-portlet mw-portlet-tb" > <div class="vector-menu-heading"> Geral </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-whatlinkshere" class="mw-list-item"><a href="/wiki/Especial:P%C3%A1ginas_afluentes/Z39.50" title="Lista de todas as páginas que contêm hiperligações para esta [j]" accesskey="j"><span>Páginas afluentes</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Especial:Altera%C3%A7%C3%B5es_relacionadas/Z39.50" rel="nofollow" title="Mudanças recentes nas páginas para as quais esta contém hiperligações [k]" accesskey="k"><span>Alterações relacionadas</span></a></li><li id="t-upload" class="mw-list-item"><a href="/wiki/Wikipedia:Carregar_ficheiro" title="Carregar ficheiros [u]" accesskey="u"><span>Carregar ficheiro</span></a></li><li id="t-specialpages" class="mw-list-item"><a href="/wiki/Especial:P%C3%A1ginas_especiais" title="Lista de páginas especiais [q]" accesskey="q"><span>Páginas especiais</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Z39.50&oldid=63284998" title="Hiperligação permanente para esta revisão desta página"><span>Hiperligação permanente</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Z39.50&action=info" title="Mais informações sobre esta página"><span>Informações da página</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Especial:Citar&page=Z39.50&id=63284998&wpFormIdentifier=titleform" title="Informação sobre como citar esta página"><span>Citar esta página</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Especial:UrlShortener&url=https%3A%2F%2Fpt.wikipedia.org%2Fwiki%2FZ39.50"><span>Obter URL encurtado</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Especial:QrCode&url=https%3A%2F%2Fpt.wikipedia.org%2Fwiki%2FZ39.50"><span>Descarregar código QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Imprimir/exportar </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Especial:Livro&bookcmd=book_creator&referer=Z39.50"><span>Criar um livro</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Especial:DownloadAsPdf&page=Z39.50&action=show-download-screen"><span>Descarregar como PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Z39.50&printable=yes" title="Versão para impressão desta página [p]" accesskey="p"><span>Versão para impressão</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Noutros projetos </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q135847" title="Hiperligação para o elemento do repositório de dados [g]" accesskey="g"><span>Elemento Wikidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Ferramentas de página"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Aspeto"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Aspeto</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">mover para a barra lateral</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">ocultar</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Origem: Wikipédia, a enciclopédia livre.</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="pt" dir="ltr"><p><b>Z39.50</b> é um padrão internacional do tipo <a href="/wiki/Modelo_cliente%E2%80%93servidor" title="Modelo cliente–servidor">cliente-servidor</a>, um <a href="/wiki/Protocolo_(ci%C3%AAncia_da_computa%C3%A7%C3%A3o)" title="Protocolo (ciência da computação)">protocolo</a> de comunicação da <a href="/wiki/Camada_de_aplica%C3%A7%C3%A3o" title="Camada de aplicação">camada de aplicação</a> para buscas e recuperação de informação a partir de uma base de dados que atua sobre uma rede <a href="/wiki/TCP/IP" title="TCP/IP">TCP/IP</a>. É coberto pelos padrões <a href="/wiki/American_National_Standards_Institute" title="American National Standards Institute">ANSI</a>/NISO Z39.50 e <a href="/wiki/Organiza%C3%A7%C3%A3o_Internacional_de_Normaliza%C3%A7%C3%A3o" title="Organização Internacional de Normalização">ISO</a> 23950. A agência mantenedora do padrão é a <a href="/wiki/Biblioteca_do_Congresso" title="Biblioteca do Congresso">Biblioteca do Congresso dos Estados Unidos</a>. </p><p>O Z39.50 é amplamente utilizado em ambientes de <a href="/wiki/Biblioteca" title="Biblioteca">bibliotecas</a>, frequentemente incorporado em sistemas de gerenciamento integrado de bibliotecas e sistemas pessoais de referências bibliográficas. Buscas de catálogos interbibliotecas para empréstimos entre bibliotecas (EEB) são frequentemente implementados com consultas Z39.50. </p><p>O desenvolvimento do protocolo Z39.50 começou na década de 1970 e teve sucessivas versões em 1988, 1992, 1995 e 2003. A Linguagem de Consulta Contextual (<a href="/w/index.php?title=Contextual_Query_Language&action=edit&redlink=1" class="new" title="Contextual Query Language (página não existe)">Contextual Query Language</a>, CQL)<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span>[</span>1<span>]</span></a></sup> é baseada na semântica do Z39.50. </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Esforços_para_modernização"><span id="Esfor.C3.A7os_para_moderniza.C3.A7.C3.A3o"></span>Esforços para modernização</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Z39.50&veaction=edit&section=1" title="Editar secção: Esforços para modernização" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Z39.50&action=edit&section=1" title="Editar código-fonte da secção: Esforços para modernização"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>O Z39.50 é uma tecnologia pré-Web e vários grupos de trabalho tentaram atualizá-lo para se encaixar melhor no ambiente moderno. Essas tentativas foram conhecidas como ZING (Z39.50 International: Next Generation – Z39.50 Internacional: Nova Geração) e possuíram várias estratégias. </p><p>Os sucessores do Z39.50 são os protocolos gêmeos <a href="/w/index.php?title=Search/Retrieve_via_URL&action=edit&redlink=1" class="new" title="Search/Retrieve via URL (página não existe)">SRU</a>/<a href="/w/index.php?title=Search/Retrieve_Web_service&action=edit&redlink=1" class="new" title="Search/Retrieve Web service (página não existe)">SRW</a> (Search/Retrieve via URL/Search/Retrieve Web service), que retiraram a necessidade do protocolo de comunicação Z39.50 (substituindo pelo <a href="/wiki/Hypertext_Transfer_Protocol" title="Hypertext Transfer Protocol">HTTP</a>), mas mantendo os benefícios da sintaxe de consulta. O SRU é baseado na arquitetura <a href="/wiki/REST" title="REST">REST</a> e possibilita que as consultas sejam expressas em parâmetros de URL, já o SRW usa o protocolo <a href="/wiki/SOAP" title="SOAP">SOAP</a>. Ambos retornam os resultados em <a href="/wiki/XML" title="XML">XML</a>. </p><p>Esses projetos têm uma barreira muito menor para desenvolvedores que o protocolo Z39.50 original,<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span>[</span>2<span>]</span></a></sup> permitindo que o mercado relativamente pequeno de software de bibliotecas se beneficie das ferramentas de <a href="/wiki/Web_service" title="Web service">serviços Web</a> desenvolvidas para mercados muito maiores.   </p><p>Alternativas incluem os seguintes protocolos:<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span>[</span>3<span>]</span></a></sup> </p> <ul><li><a href="/wiki/OAI-PMH" title="OAI-PMH">Open Archives Initiative Protocol for Metadata Harvesting</a> (OAI-PMH)</li> <li><a href="/wiki/SPARQL" title="SPARQL">SPARQL</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Informação_de_firewall"><span id="Informa.C3.A7.C3.A3o_de_firewall"></span>Informação de firewall</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Z39.50&veaction=edit&section=2" title="Editar secção: Informação de firewall" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Z39.50&action=edit&section=2" title="Editar código-fonte da secção: Informação de firewall"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>A porta <a href="/wiki/Endere%C3%A7o_IP" title="Endereço IP">IP</a> registrada para o Z39.50 é a 210. Embora a maioria dos servidores utilizem essa porta, há dezenas de outras portas utilizadas pelo mundo (por exemplo, 2100, 2200, 2210, 2213, 3520, 9999, etc.).<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span>[</span>4<span>]</span></a></sup><sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span>[</span>5<span>]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Ver_também"><span id="Ver_tamb.C3.A9m"></span>Ver também</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Z39.50&veaction=edit&section=3" title="Editar secção: Ver também" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Z39.50&action=edit&section=3" title="Editar código-fonte da secção: Ver também"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a href="/wiki/OpenURL" title="OpenURL">OpenURL</a></li> <li><a href="/wiki/Koha_(software)" title="Koha (software)">Koha</a></li> <li><a href="/wiki/Formato_MARC" title="Formato MARC">Formato MARC</a></li> <li><a href="/wiki/Cataloga%C3%A7%C3%A3o_bibliogr%C3%A1fica" title="Catalogação bibliográfica">Catalogação bibliográfica</a></li></ul> <div class="mw-heading mw-heading2"><h2 id="Ligações_externas"><span id="Liga.C3.A7.C3.B5es_externas"></span>Ligações externas</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Z39.50&veaction=edit&section=4" title="Editar secção: Ligações externas" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Z39.50&action=edit&section=4" title="Editar código-fonte da secção: Ligações externas"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20070312091700/http://www.ibict.br/cionline/viewarticle.php?id=430&layout=abstract">ROSETTO, M. Uso do protocolo z39.50 para recuperação de informação em redes eletrônicas</a></li> <li><a rel="nofollow" class="external text" href="http://www.loc.gov/z3950/agency/">Z39.50 Maintenance Agency</a> (em inglês)</li> <li><a rel="nofollow" class="external text" href="http://www.loc.gov/z3950/agency/Z39-50-2003.pdf">Z39.50 Standard Document (pdf)</a> (em inglês)</li> <li><a rel="nofollow" class="external text" href="http://www.indexdata.dk/targettest/">Z39.50 Server Directory</a> (em inglês)</li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20070410144807/http://www.collectionscanada.ca/bath/bp-current.htm">Bath Profile</a> (em inglês)</li> <li><a rel="nofollow" class="external text" href="http://www.loc.gov/z3950/agency/zing/zing-home.html">ZING</a> (em inglês)</li></ul> <div class="mw-heading mw-heading3"><h3 id="Software">Software</h3><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Z39.50&veaction=edit&section=5" title="Editar secção: Software" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Z39.50&action=edit&section=5" title="Editar código-fonte da secção: Software"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><a rel="nofollow" class="external text" href="http://zoom.z3950.org">Z39.50 Object Orientation Module</a> (em inglês)</li> <li><a rel="nofollow" class="external text" href="http://www.indexdata.dk/yaz/">YAZ Toolkit</a> (em inglês)</li></ul> <div class="mw-heading mw-heading2"><h2 id="Referências"><span id="Refer.C3.AAncias"></span>Referências</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Z39.50&veaction=edit&section=6" title="Editar secção: Referências" class="mw-editsection-visualeditor"><span>editar</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Z39.50&action=edit&section=6" title="Editar código-fonte da secção: Referências"><span>editar código-fonte</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><a rel="nofollow" class="external text" href="https://www.loc.gov/standards/sru/specs/cql.html">CQL: the Contextual Query Language: Specifications</a> SRU: Search/Retrieval via URL, Standards, Library of Congress</span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="http://www.dlib.org/dlib/april97/04lynch.html">«The Z39.50 Information Retrieval Standard: Part I: A Strategic View of Its Past, Present and Future»</a>. <i>www.dlib.org</i><span class="reference-accessdate">. Consultado em 22 de janeiro de 2020</span></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AZ39.50&rft.atitle=The+Z39.50+Information+Retrieval+Standard%3A+Part+I%3A+A+Strategic+View+of+Its+Past%2C+Present+and+Future&rft.genre=unknown&rft.jtitle=www.dlib.org&rft_id=http%3A%2F%2Fwww.dlib.org%2Fdlib%2Fapril97%2F04lynch.html&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal" class="Z3988"><span style="display:none;"> </span></span></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://pantherfile.uwm.edu/kipp/public/courses/791/791assign-metadataretrieval.html">«Linked Data in Libraries Metadata Retrieval and Harvesting»</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AZ39.50&rft.btitle=Linked+Data+in+Libraries+Metadata+Retrieval+and+Harvesting&rft.genre=unknown&rft_id=https%3A%2F%2Fpantherfile.uwm.edu%2Fkipp%2Fpublic%2Fcourses%2F791%2F791assign-metadataretrieval.html&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.loc.gov/z3950/agency/wisdom/firewall.html">«Library of Congress Z39.50 Firewall Information»</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AZ39.50&rft.btitle=Library+of+Congress+Z39.50+Firewall+Information&rft.genre=unknown&rft_id=https%3A%2F%2Fwww.loc.gov%2Fz3950%2Fagency%2Fwisdom%2Ffirewall.html&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://www.iana.org/assignments/service-names-port-numbers/service-names-port-numbers.xhtml">«IANA Port and Protocol Registry»</a></cite><span title="ctx_ver=Z39.88-2004&rfr_id=info%3Asid%2Fpt.wikipedia.org%3AZ39.50&rft.btitle=IANA+Port+and+Protocol+Registry&rft.genre=unknown&rft_id=https%3A%2F%2Fwww.iana.org%2Fassignments%2Fservice-names-port-numbers%2Fservice-names-port-numbers.xhtml&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook" class="Z3988"><span style="display:none;"> </span></span></span> </li> </ol></div> <div role="navigation" class="navbox" aria-labelledby="Controle_de_autoridade" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th id="Controle_de_autoridade" scope="row" class="navbox-group" style="width:1%;width: 12%; 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