top-element (availability "PUBLIC") registered organization (type "DTD")
label (language "EN") url)
(when (in format :xhtml :xhtml11 :xhtml10-strict :xhtml10-transitional :xhtml10-frameset :xml :docbook)
top-element (availability "PUBLIC") registered organization (type "DTD")
label (language "EN") url)
(when (in format :xhtml :xhtml11 :xhtml10-strict :xhtml10-transitional :xhtml10-frameset :xml :docbook)