store offline data for querying readonly data in ipad app

My app will consume a xml web service that will pull info, images and documents from the server and store it offlin开发者_运维百科e (docs and images are stored on a path, not in the database). I need to perform some simple queries on the offline data for viewing and browsing the offline data.

There will be no updates made on the client, the data is readonly, no need to push updates back to the server.

Should I use Core Data? Or plain XML?

What is the best solution for storing this data?

Thanks.

CoreData, its reliable and will give you the query abilities you want. You could use sqllite too but CoreData will probably be simpler, especially if your data structure is not changing alot.