US Patent Application US20120226658: Data model versioning for document databases
Claim #1 describes an extremely simple versioning system for a document database:
- A method, comprising:
reading, by a processing device, a first version tag, the first version tag associated with a document database;
comparing the first version tag to a second version tag, the second version tag associated with a current document template of an application; and
if the first version tag does not match the second version tag, performing a version migration operation to update a document format of the document database.
If I am reading this correctly, it's attempting to patent a system in which one revision number is compared to the previous revision number, and if it's different do an upgrade.
Claims 8 and 15 go on to describe a "processing system" and a "machine-readable storage medium" without adding any specific details.
Surely there must be prior art for this?