Bring the remaining vCard 3 REV and KEY behavior into line with RFC
2426.
For REV, serialize VALUE=date using the date form instead of incorrectly
emitting VALUE=date-time with a timestamp payload.
For KEY, stop defaulting constructed values to VALUE=uri. The vCard 3
specification defines KEY as binary by default and allows it to be reset
to text, but not to uri. Tighten both construction and parsing
accordingly: reject VALUE=uri for KEY, enforce the relationship between
VALUE=binary and ENCODING=b, and reject VALUE=text when ENCODING=b is
present.
Update the regression coverage to reflect the spec boundary: PHOTO,
LOGO, and SOUND may round-trip as uris; KEY may contain text that looks
like a URI; KEY does not allow VALUE=uri; and vCard 3 KEY parameters
still require name=value syntax.
AI-Assisted: yes
AI-Tool: OpenAI Codex / gpt-5.4 xhigh
Jonathan Bernard
8f2a05cde6
