FORMAT REFERENCE
vCard Property Reference
A vCard is a set of named properties with parameters and values. Knowing the common properties makes validation and troubleshooting easier.
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Common properties
FN is the formatted display name. N stores structured name parts. TEL stores phone numbers. EMAIL stores email addresses. ORG and TITLE describe work details. NOTE, CATEGORIES, UID, and PHOTO add optional context.
Unknown and X- properties
Applications often add vendor properties. A safe converter should preserve unknown properties when it can, or explain when a target version cannot represent them.