"attribute", AXIS Ast.Attribute;
"following-sibling", AXIS Ast.FollowingSibling;
"preceding-sibling", AXIS Ast.PrecedingSibling;
"parent", AXIS Ast.Parent;
"attribute", AXIS Ast.Attribute;
"following-sibling", AXIS Ast.FollowingSibling;
"preceding-sibling", AXIS Ast.PrecedingSibling;
"parent", AXIS Ast.Parent;