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A similar sort of conditional posting is implemented in the Atom Binding. The difference is that the HTTP binding requires an implementer to provide conditional methods. The Atom binding caching uses the Abdera Atom model objects to automatically derive an ETag and a LastModified tags. In the Atom model, the Entry or Feed ID is used to make an item ETag field. The Atom Entry or Feed updated field is used to make an item LastModified field.

Use the HTTP binding caching when you are not using Atom Entries and Feeds as your business objects. However, the more flexible HTTP binding caching requires you to implement special conditional methods. Use the Atom binding when you can model your business data in terms of Atom Entries and Feeds. The more constrictive Atom binding caching will derive caching tags from your data model fields.