Here is a list of all variables with links to the classes they belong to:

_childElement : libhtmlpp::HtmlElement, libhtmlpp::ScriptElement, libhtmlpp::SvgElement, libhtmlpp::TextArea
_Comment : libhtmlpp::CommentElement
_nextElement : libhtmlpp::Element
_prevElement : libhtmlpp::Element
_Script : libhtmlpp::ScriptElement
_Svg : libhtmlpp::SvgElement
_Text : libhtmlpp::TextArea, libhtmlpp::TextElement
Data : libhtmlpp::HtmlTable::Column
element : libhtmlpp::DocElements
nextel : libhtmlpp::DocElements
prevel : libhtmlpp::DocElements
terminator : libhtmlpp::DocElements