Information architecture determines what content you must put where in your database.
It is always better to plan your database before you start populating it, instead of making it up as you go.
Ask yourself questions like:
This list is by no means exhaustive. Other questions you might want to answer:
What images and illustrations do I need?
In what format?
Do I need different images for different outputs (think of size, resolution, palette)?
And also:
What is the internal structure of my documents? Am I bound to a regulation or standard?
What metadata do I want to use? Do I have to create an ontology? Did someone else create one already? .