Errors:
A document must not include both a “meta” element with an “http-equiv” attribute whose value is “content-type”, and a “meta” element with a “charset” attribute.
Element “noindex” not allowed as child of element “li” in this context. (Suppressing further errors from this subtree.)
No “p” element in scope but a “p” end tag seen.
Element “noindex” not allowed as child of element “body” in this context. (Suppressing further errors from this subtree.)
Bad value “” for attribute “src” on element “img”: Must be non-empty.
Bad value “true” for attribute “multiple” on element “select”.
Attribute “langcollection” not allowed on element “select” at this point.
Bad value “true” for attribute “selected” on element “option”.
Element “a” not allowed as child of element “ul” in this context. (Suppressing further errors from this subtree.)
Bad value “/category/?category_id=1012&category_name=Естественные науки в целом” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=1110&category_name=Физико-математические науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=10248&category_name=Химические науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=12871&category_name=Науки о Земле” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=19485&category_name=Биологические науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=25699&category_name=Техника и технические науки в целом” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=26580&category_name=Энергетика. Радиоэлектроника” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=30958&category_name=Горное дело” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=37274&category_name=Технология древесины. Производства легкой промышленности. Фотокинотехника. Полиграфическое производство” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=34613&category_name=Химическая технология. Химические и пищевые производства” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=31944&category_name=Технология металлов. Машиностроение. Приборостроение” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=43943&category_name=Сельское и лесное хозяйство. Сельскохозяйственные и лесохозяйственные науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=51016&category_name=Здравоохранение. Медицинские науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=60235&category_name=Общественные науки в целом” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=61510&category_name=История. Исторические науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=70886&category_name=Экономика. Экономические науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=79739&category_name=Политические партии. Общественно-политические организации” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=82272&category_name=Государство и право. Юридические науки” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=85914&category_name=Военная наука. Военное дело” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=92713&category_name=Культура. Наука. Просвещение” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=99693&category_name=Филологические науки. Художественная литература” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=109927&category_name=Искусство. Искусствознание” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=116362&category_name=Религия. Атеизм” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=117387&category_name=Философские науки. Психология” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Bad value “/category/?category_id=119219&category_name=Литература универсального содержания” for attribute “href” on element “a”: Illegal character in query: space is not allowed.
Attribute “alt” not allowed on element “a” at this point.
Warnings:
Section lacks heading. Consider using “h2”-“h6” elements to add identifying headings to all sections.
Empty heading.