What's new in SharePoint 2010 Lists

SharePoint 2010 introduces the following changes to the List:

• New events - WebAdding, WebProvisioning, ListAdding, ListAdded, ListDeleting, ListDeleted
• Site Collection events
• Synchronous "after" events to perform post-processing
• Custom error pages
• New property PSEventPropertiesBase to store the user name and token of the person who triggered the effective action
• New integrity constraints based on the lookup
• Projected Fields - fields from the parent which are referenced and displayed in the child list
• Max 50M items under the read scenario
• List query size threshold - return warning or exception of query result exceeds threshold number of records
• Threshold pre-set is 5000 items for the normal user and 20000 items for the Super User
• List Administrators are notified when lists exceed threshold
• List constraints - max 8kb of data per list item (excluding attachments), 6 projected fields on joins (except using the view fields)
• Columns can be flagged as UNIQUE (must be indexed)
• Columns can be validated using custom field or by other fields