1xpointer(string-range(//p, 'simple'))
2xpointer(string-range(//p, 'test'))
3xpointer(string-range(//p, 'difficult'))
4xpointer(string-range(//p, 'spanning'))
5xpointer(string-range(//p, 'unbalanced'))
6xpointer(string-range(//seq, ''))
7