| blank |
The about:blank URI references a blank page. |
RFC 6694 |
| invalid |
The about:invalid URI references a non-existent
document with a generic error condition. It can be used when a URI is
necessary, but the default value shouldn't be resolveable as any type
of document. |
http://dev.w3.org/csswg/css3-values/#about-invalid; CSS Working Group |
| srcdoc |
Used as the document's address of iframe srcdoc documents in HTML. |
http://www.whatwg.org/specs/web-apps/current-work/#about:srcdoc; Ian Hickson |
| legacy-compat |
For use in DOCTYPEs in HTML documents when needed for compatibility with XML tools. |
http://www.whatwg.org/specs/web-apps/current-work/#about:legacy-compat; Ian Hickson |
| html-kind |
The about:html-kind URI identifies the vocabulary of kind values in HTML specifications from W3C and WhatWG. |
https://html.spec.whatwg.org/multipage/embedded-content.html#identifying-a-track-kind-through-a-url; David Singer |
