The following table has been used to initialize the parameters registry.
    +----------------+---------+--------------------------+
    | Parameter      | Status  | Reference                |
    +----------------+---------+--------------------------+
    | ALTREP         | Current | RFC 5545, Section 3.2.1  |
    |                |         |                          |
    | CN             | Current | RFC 5545, Section 3.2.2  |
    |                |         |                          |
    | CUTYPE         | Current | RFC 5545, Section 3.2.3  |
    |                |         |                          |
    | DELEGATED-FROM | Current | RFC 5545, Section 3.2.4  |
    |                |         |                          |
    | DELEGATED-TO   | Current | RFC 5545, Section 3.2.5  |
    |                |         |                          |
    | DIR            | Current | RFC 5545, Section 3.2.6  |
    |                |         |                          |
    | ENCODING       | Current | RFC 5545, Section 3.2.7  |
    |                |         |                          |
    | FMTTYPE        | Current | RFC 5545, Section 3.2.8  |
    |                |         |                          |
    | FBTYPE         | Current | RFC 5545, Section 3.2.9  |
    |                |         |                          |
    | LANGUAGE       | Current | RFC 5545, Section 3.2.10 |
    |                |         |                          |
    | MEMBER         | Current | RFC 5545, Section 3.2.11 |
    |                |         |                          |
    | PARTSTAT       | Current | RFC 5545, Section 3.2.12 |
    |                |         |                          |
    | RANGE          | Current | RFC 5545, Section 3.2.13 |
    |                |         |                          |
    | RELATED        | Current | RFC 5545, Section 3.2.14 |
    |                |         |                          |
    | RELTYPE        | Current | RFC 5545, Section 3.2.15 |
    |                |         |                          |
    | ROLE           | Current | RFC 5545, Section 3.2.16 |
    |                |         |                          |
    | RSVP           | Current | RFC 5545, Section 3.2.17 |
    |                |         |                          |
    | SENT-BY        | Current | RFC 5545, Section 3.2.18 |
    |                |         |                          |
    | TZID           | Current | RFC 5545, Section 3.2.19 |
    |                |         |                          |
    | VALUE          | Current | RFC 5545, Section 3.2.20 |
    +----------------+---------+--------------------------+
     