to_xml() produces invalid datetimes.

[MatteBailey]

We recently discovered that the to_xml() function provided by ome-types produces datetimes that look like 2016-03-11T10:23:44.925154UTC, which violate the XSD dateTime format. Instead, the datetime in this case should be 2016-03-11T10:23:44.9251548Z, which is what is in the source XML.

Steps to reproduce:

1. Extract OverViewScan.ome.xml from this ZIP: OverViewScan.ome.xml.zip
2. Load that XML into ome-types, output it to XML, and try to load it again, like this:

from pathlib import Path
from ome_types import from_xml, to_xml

if __name__ == '__main__':
    og_xml = Path("OverViewScan.ome.xml").read_text()
    ome = from_xml(og_xml)
    output_xml = to_xml(ome)
    from_xml(output_xml)

3. Receive the following error:

xmlschema.validators.exceptions.XMLSchemaDecodeError: failed validating '2016-03-11T10:23:44.925154UTC' with XsdAtomicBuiltin(name='xs:dateTime'):

Reason: attribute StartTime='2016-03-11T10:23:44.925154UTC': Invalid datetime string '2016-03-11T10:23:44.925154UTC' for <class 'elementpath.datatypes.datetime.DateTime10'>

Thanks for taking a look!

[tlambert03]

Thanks @MatteBailey.
can you tell me what version of elementpath and xmlschema you have installed?

[MatteBailey]

From running pip list, I get elementpath 2.2.3 and xmlschema 1.4.1.