XQuery：产生具有attr的元素也具有价值？

Question

For example, I want to create such element below:

<book year="2010">Example name</book>

What is the correct usage of computed element constructor?

Answer 1

element book {
  attribute year { 2010 },
  'Example name'
}

Or some would suggest

element book {
  attribute year { 2010 },
  text { 'Example name' }
}