{"version":"1.0","provider_name":"Open Economics Guide of the ZBW","provider_url":"https:\/\/openeconomics.zbw.eu\/en\/","author_name":"osguide","author_url":"https:\/\/openeconomics.zbw.eu\/en\/author\/osguide\/","title":"Unpaywall &#8211; Open Economics Guide of the ZBW","type":"rich","width":600,"height":338,"html":"<blockquote class=\"wp-embedded-content\" data-secret=\"C3OqSjAKam\"><a href=\"https:\/\/openeconomics.zbw.eu\/en\/knowledgebase\/unpaywall\/\">Unpaywall<\/a><\/blockquote><iframe sandbox=\"allow-scripts\" security=\"restricted\" src=\"https:\/\/openeconomics.zbw.eu\/en\/knowledgebase\/unpaywall\/embed\/#?secret=C3OqSjAKam\" width=\"600\" height=\"338\" title=\"&#8220;Unpaywall&#8221; &#8212; Open Economics Guide of the ZBW\" data-secret=\"C3OqSjAKam\" frameborder=\"0\" marginwidth=\"0\" marginheight=\"0\" scrolling=\"no\" class=\"wp-embedded-content\"><\/iframe><script type=\"text\/javascript\">\n\/* <![CDATA[ *\/\n\/*! This file is auto-generated *\/\n!function(d,l){\"use strict\";l.querySelector&&d.addEventListener&&\"undefined\"!=typeof URL&&(d.wp=d.wp||{},d.wp.receiveEmbedMessage||(d.wp.receiveEmbedMessage=function(e){var t=e.data;if((t||t.secret||t.message||t.value)&&!\/[^a-zA-Z0-9]\/.test(t.secret)){for(var s,r,n,a=l.querySelectorAll('iframe[data-secret=\"'+t.secret+'\"]'),o=l.querySelectorAll('blockquote[data-secret=\"'+t.secret+'\"]'),c=new RegExp(\"^https?:$\",\"i\"),i=0;i<o.length;i++)o[i].style.display=\"none\";for(i=0;i<a.length;i++)s=a[i],e.source===s.contentWindow&&(s.removeAttribute(\"style\"),\"height\"===t.message?(1e3<(r=parseInt(t.value,10))?r=1e3:~~r<200&&(r=200),s.height=r):\"link\"===t.message&&(r=new URL(s.getAttribute(\"src\")),n=new URL(t.value),c.test(n.protocol))&&n.host===r.host&&l.activeElement===s&&(d.top.location.href=t.value))}},d.addEventListener(\"message\",d.wp.receiveEmbedMessage,!1),l.addEventListener(\"DOMContentLoaded\",function(){for(var e,t,s=l.querySelectorAll(\"iframe.wp-embedded-content\"),r=0;r<s.length;r++)(t=(e=s[r]).getAttribute(\"data-secret\"))||(t=Math.random().toString(36).substring(2,12),e.src+=\"#?secret=\"+t,e.setAttribute(\"data-secret\",t)),e.contentWindow.postMessage({message:\"ready\",secret:t},\"*\")},!1)))}(window,document);\n\/\/# sourceURL=https:\/\/openeconomics.zbw.eu\/wp-includes\/js\/wp-embed.min.js\n\/* ]]> *\/\n<\/script>\n","description":"[vc_row el_class=\"oeg-kbentry oeg-kbentry-tool\"][vc_column width=\"2\/5\" el_class=\"oeg-kbentry-sidebar-box\"][vc_widget_sidebar sidebar_id=\"knowledgebasesidebartoolsen\" el_class=\"oeg-kbentry-sidebar\"][\/vc_column][vc_column width=\"3\/5\" el_class=\"oeg-kbentry-content-box\"][vc_column_text el_class=\"oeg-kbentry-content-title\"] [\/vc_column_text][vc_column_text el_class=\"oeg-kbentry-content\"] Unpaywall is an open database in which around 32 million free-of-charge accessible texts are collected. With the help of a browser extension for Chrome, it offers simple and legal access to the Open Access texts for download. Unpaywall traces the Open Access texts on the basis of the DOI. The data, which serve to detect the Open Access texts, originate from Crossref and the Directory of Open Access Journals (DOAJ). The majority of the data however comes from the fact that Unpaywall itself observes more than 50,000 storage [&hellip;]","thumbnail_url":"https:\/\/openeconomics.zbw.eu\/wp-content\/uploads\/2021\/07\/open-economics-guide-social.png","thumbnail_width":800,"thumbnail_height":420}