Hi Folks,

Here is more context to my post. I am reading the vCard RFC. (https://tools.ietf.org/html/rfc6350)  The RFC specifies number of occurrences this way:

    +-------------+--------------------------------------------------+

    | Cardinality | Meaning                                          |

    +-------------+--------------------------------------------------+

    |      1      | Exactly one instance per vCard MUST be present.  |

    |      *1     | Exactly one instance per vCard MAY be present.   |

    |      1*     | One or more instances per vCard MUST be present. |

    |      *      | One or more instances per vCard MAY be present.  |

    +-------------+--------------------------------------------------+

I interpreted that table this way:

Cardinality =   1 means: minOccurs=1 and maxOccurs=1

Cardinality = *1 means: minOccurs=0 and maxOccurs=1

Cardinality = 1*means:  minOccurs=1 and maxOccurs=unbounded

Cardinality = * means:    minOccurs=0 and maxOccurs=unbounded

Do you agree?

The RFC says this interesting thing: Elements with the same altid (alternative identifier) don’t count toward cardinality.

/Roger