Descriptive criteria: different approaches

Archival

Focused on the context
What is the structure of the collection I am looking at?
How and why was it formed?
Which are the logical links between one document and another?
Great interest for the history of the item

Librarian

Focused on the item
Where is the resource I am looking for?
Is this the resource I am looking for?
Which are the bibliographic links between one resource and another?
Little interest for the history of the item