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Contains various information about errors thrown by libxml. The error codes are described within the official » xmlError API documentation.
the severity of the error (one of the following constants:
The error's code.
The column where the error occurred.
This property isn't entirely implemented in libxml and therefore 0 is often returned.
The error message, if any.
The filename, or empty if the XML was loaded from a string.
The line where the error occurred.