Kosmonauta.net W3C HTML Markup Validation
HTML markup errors and warnings
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Errors:
Bad value “http://fonts.googleapis.com/css?family=Open+Sans:400,400Italic,600,700|Roboto+Slab|Merriweather:300italic&subset=latin,latin-ext” for attribute “href” on element “link”: Illegal character in query: “|” is not allowed.
Bad value “https://api.w.org/” for attribute “rel” on element “link”: The string “https://api.w.org/” is not a registered keyword.
Quote “"” in attribute name. Probable cause: Matching quote missing somewhere earlier.
Attribute “class"” not allowed on element “a” at this point.
Bad value “http://kosmonauta.net/wp-content/uploads/2012/07/images_stories_2012_08 voyager 1 wkrtce w przestrzeni midzygwiezdnej0-110x96.jpg” for attribute “src” on element “img”: Illegal character in path segment: space is not allowed.
The “itemprop” attribute was specified, but the element is not a property of any item.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Attribute “class"” is not serializable as XML 1.0.
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