OverflowError when parsing a valid dateTime value

[StanimirIglev]

Description

When attempting to create a DateTime object for 9999-12-31T24:00:00, the library raises an OverflowError: date value out of range. According to the XML Schema 1.1. Part 2: Datatypes specification, '24:00:00' is a valid representation for midnight at the end of a day. Therefore, the DateTime class should accept 9999-12-31T24:00:00. The expected behavior would likely be to create a DateTime object for 10000-01-01T00:00:00, as it is semantically equivalent to 9999-12-31T24:00:00.

Steps to reproduce

>>> import elementpath
>>> elementpath.datatypes.DateTime(9999, 12, 31, 24, 00, 00)

Environment

• Python Version: 3.13.0
• elementpath Version: 4.7.0

Additional context

• The bug was detected while trying to validate a document using the xmlschema library. Though it seems to stem from the elementpath's DateTime data type.

Please let me know if you need any further information. Thank you for looking into this!

[brunato]

Hi,

thank you for the detailed description of the problem.
About the issue I'm pretty confident that it could be resolved with an additional check, maybe with a fallback to a semantically equivalent object as you noticed.

About the context often issues of elementpath are detected using the xmlschema library, but this is the nature of these standards, and having a separate contexts has favorite the develop a more flexible XPath processor.

best

[brunato]

Hi, v4.8.0 is finally out, this issue should be fixed.

best