| <!-- The following DTD is a simple view of a book: |
| book |
| index |
| + |
| word |
| #PCDATA |
| page |
| #PCDATA |
| chapter+ |
| comment? |
| #PCDATA |
| paragraph* |
| #PCDATA |
| summary? |
| #PCDATA |
| |
| good |
| EMPTY |
| --> |
| |
| <!ELEMENT summary (#PCDATA)> |
| |
| <!ELEMENT book (index+, chapter+, summary?, author+, good, available)> |
| |
| <!ELEMENT good EMPTY> |
| |
| <!ELEMENT available EMPTY> |
| |
| <!ELEMENT index (word, ref+)> |
| |
| <!ELEMENT ref (page, line)> |
| |
| <!ELEMENT word (#PCDATA)> |
| |
| <!ELEMENT author (#PCDATA)> |
| |
| <!ELEMENT line (#PCDATA)> |
| |
| <!ELEMENT page (#PCDATA)> |
| |
| <!ELEMENT chapter (comment?, paragraph*)> |
| |
| <!ELEMENT paragraph (#PCDATA)> |
| |
| <!ELEMENT comment (#PCDATA)> |
| |
| |
| |
| |
