Syncing iOS Core Data with remote server which sends XML

[longnoselittlepittle]

My app parses XML from remote server and store the objects in Core Data(SQLite storage). So that user can browse the material when OFFLINE by reading from local storage.

User may make changes to objects when browsing offline which gets stored locally in Core Data SQLite store. Another User makes some changes to object on Remote server and it is stored there. Now when I detect internet connection, my app should sync my local storage with remote server. Which means remote server is updated with changes I made to my Core Data(SQLite storage) when I was offline and my local storage - Core Data(SQLite storage) needs to be updated with what ever changes other user made to remote server.

For example there is a forum and it is stored in my local storage so that I can read and reply when I am traveling. When later on internet is accessible. My app should automatically put all my replies stored in core data to remote server and also bring other posts on remote server into my local storage.

Remote server is sending XML which I'm parsing and storing in Coredata. My problem is how to sync it ?

How both ways communication happens when there is a change?

How to sync only data which has changed and not to IMPORT whole remote server DB and vice-versa ?

[nsc]

Hi - were you able to find a solution for this? We need to do a similar sync operation between the offline SQLite Store and remote server.

[mpramodjain]

hi,

any solutions.. me also looking for ont the same track, without any possiblity..

The one I thought was about, getting queries of the modified one on the sqlite from the server, then ..

Thinking about execute those sql queries over coredata.. wondering how could be possble..

Any other ideas.. or fruitful solution.. to sync the server changes in the DB to the Coredata object..