Modifying data
Unlike views, regular data records don't have an XML arch structure and can't be extended using XPath expressions. But they can still be modified replacing the values in their fields.
The <record id="x" model="y"> data loading elements actually perform an insert or update operation on the model y: if model x does not exist, it is created; otherwise, it is updated/written over.
Since records in other modules can be accessed using a <model>.<identifier> global identifier, it's possible for our module to overwrite something that was written before by another module.
Note
Note that since the dot is reserved to separate the module name from the object identifier, it can't be used in identifier names. Instead, use the underscore option.
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