1.0DANShttps://dans.knaw.nl/en/Ingrid Korverrich600338<blockquote class="wp-embedded-content" data-secret="4y5ZRKDPfN"><a href="https://dans.knaw.nl/en/file-formats/markup-language/css/">CSS</a></blockquote><iframe sandbox="allow-scripts" security="restricted" src="https://dans.knaw.nl/en/file-formats/markup-language/css/embed/#?secret=4y5ZRKDPfN" width="600" height="338" title="“CSS” — DANS" data-secret="4y5ZRKDPfN" frameborder="0" marginwidth="0" marginheight="0" scrolling="no" class="wp-embedded-content"></iframe><script> /*! This file is auto-generated */ !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); //# sourceURL=https://dans.knaw.nl/wp-includes/js/wp-embed.min.js </script> Cascading Style Sheets (CSS) is widely used on the Web to define the layout of markup language documents. There are different versions of CSS. For permanent archiving it must be made clear to which files the CSS files refer and which version of CSS is being used. As browser-specific extensions may exist, the target environment […]