new(tag, attrs, [child1, child2, …]) or new(tag, attrs, child1, child2, …)
tag: String attrs: Hash, Attr or Array of Attr (or nil) child?: String or Node
get the list of nodeValues by IDs [experimental implement]
[DOM]
[DOM2]
Alias for nodeName
trim extra whitespaces if attribute ‘xml:space’ is ‘preserve’, don‘t trim any white spaces
[Validate]