| Root |
| Example |
| ROOT |
| doc |
| title |
| abstract |
| chapter |
| chapter |
| chapter |
| ID= 'intro' |
| ID='concepts' |
| ID='summary' |
| Introduction |
| title |
| section |
| section |
| p |
| Attribute |
| title |
| p |
| p |
| ... |
| ID='p37' |
| a |
| xref |
| Element |
| name='baz' |
| href='#id(intro)' |
