1. Data Management Data: catalog, yellow pages, customer profiles…
query optimization, query rewriting, efficient loading…
self organizing repositories: discover new (semistructured) data and structure it, add access paths automatically based on needs...

2. Knowledge Management
Choose some domain (e.g., flowers near Versailles), discover vendors, integrate their catalog -- management of data, syntax + thesauri + metadata + knowledge...
Allow vendors/non programmers to manipulate this knowledge
add dynamically new properties, new classifications
introduce new business rules...

3. Declarative specification: data/workflow and verification
Verify partners do not violate business rules
Verify some customization is acceptable
Verify fairness of some complex business model
Check some property of vendor business model
Declarativeness is the only solution to enable such verifications

4. Declarative specification: data/workflow interoperability
Goal: paperless complex business transactions
E.g.: procurement
E.g.: mediation
Conversion/Integration of data
Interoperability of business rules
Declarativeness is the only solution to enable automatic interoperability (& verification)