u | The DTD is the contract how to find data in the document base
u | Major DTD types: |
| u | Layout oriented DTD |
| • | focus on redition |
| • | oriented on capabilities of publishing tools |
| • | suitable for layout oriented document base |
| u | Presentation oriented DTD |
| • | focus on presentation structures |
| • | flexible layout on different media |
| • | appropriate for presentation oriented document base |
| u | Database oriented DTD |
| • | representing data models |
| • | essential for data exchange on all levels |
u | The character of the required DTDs is determined by the |
| objectives on the document base |