List<Expression> list = Lists.newArrayList();
list.add(new StringConstant(attr, element.getSchema(), " " + attr.getName() + "=\""));
Expression value = attr.getValue().acceptVisitor(this);
if (!value.hasStaticString()) {
value = new ExampleExpression(value, "");
}
list.add(value);
list.add(new StringConstant(attr, element.getSchema(), "\""));
return Concatenation.create(element.getSourcePosition(), element.getSchema(), list);