impl dtd models impl dtd XMLContentSpec cmbinop cmnode cmbinop type cmnode leftnode cmnode rightnode type type xmlcontentspec.contentspecnode_choice type xmlcontentspec.contentspecnode_seq fleftchild leftnode frightchild rightnode cmnode getleft fleftchild cmnode getright frightchild isnullable type xmlcontentspec.contentspecnode_choice fleftchild.isnullable frightchild.isnullable type xmlcontentspec.contentspecnode_seq fleftchild.isnullable frightchild.isnullable calcfirstpos cmstateset type xmlcontentspec.contentspecnode_choice toset.setto fleftchild.firstpos toset.union frightchild.firstpos type xmlcontentspec.contentspecnode_seq toset.setto fleftchild.firstpos fleftchild.isnullable toset.union frightchild.firstpos calclastpos cmstateset type xmlcontentspec.contentspecnode_choice toset.setto fleftchild.lastpos toset.union frightchild.lastpos type xmlcontentspec.contentspecnode_seq toset.setto frightchild.lastpos frightchild.isnullable toset.union fleftchild.lastpos cmnode fleftchild cmnode frightchild