| An ABBR: "REF". | |
| ref and REFERENCE should be ignored. | |
| *[REF]: Reference | |
| *[ABBR]: This gets overriden by the next one. | |
| *[ABBR]: Abbreviation | |
| The HTML specification | |
| is maintained by the W3C. | |
| *[HTML]: Hyper Text Markup Language | |
| *[W3C]: World Wide Web Consortium | |