Whether an attlist declaration includes the given attribute definition
if attlist_decl.include? "xmlns:foobar"
Returns a copy of this attribute
Make a copy of this object
Examples
c = CData.new( "Some text" ) d = c.clone d.to_s # -> "Some text"
Should be obvious
@return the DocType
child of the document, if one exists, and nil otherwise.
Creates a shallow copy of self.
d = Document.new "<a><b/><b/><c><d/></c></a>" new_a = d.root.clone puts new_a # => "<a/>"
Evaluates to the unnormalized value of this entity; that is, replacing all entities – both %ent; and &ent; entities. This differs from +value()+ in that value
only replaces %ent; entities.
Unescapes all possible entities