[Bug] X-Properties lose their type when parsed from ical

[niccokunzmann]

Describe the bug

X- properties can have their type set. However, we lose that information on runtime.

To reproduce

import icalendar
cal = """
BEGIN:VCALENDAR
X-FILTER-DATE-RANGE;VALUE=PERIOD:20250202T000000/20250203T000000
END:VCALENDAR
"""
calendar  = icalendar.Calendar.from_ical(cal)
print(calendar["x-filter-date-range"])

Output:

vText(b'20250202T000000/20250203T000000')

Expected behavior

This should be vPeriod

Environment

• Operating system: linux
• Python version: 3.13
• icalendar version: 7.0.1

Additional context

• I tested it with the latest version. For example, I used the command pip3 install --upgrade https://github.com/collective/icalendar.git.
• I attached the .ics sample file, or there is no .ics sample file.

See also:

• Support jCal output format (RFC7265) waldbaer/icalendar-events-cli#42 (comment)