The Apple MeCARD for the iPhone
Apple is notorious for not supporting the Vcard format for address book entries. To compete, they have developed the mecard.
You can get a complete specification for the mecard HERE
If you would like to create a qr-code for a mecard that will enter your details into a persons address book use this format to create the qr-code.
OR to make it easier to read...
ADR:201 Selby Street, Nanaimo, BC V9R 2R2 Canada;