| 
704 | 704 |  <list style="hanging">  | 
705 | 705 |  <t hangText="date-time:">  | 
706 | 706 |  A string instance is valid against this attribute if it is  | 
707 |  | - a valid representation according to the "date-time" production.  | 
 | 707 | + a valid representation according to the "date-time' ABNF rule  | 
 | 708 | + (referenced above)  | 
708 | 709 |  </t>  | 
709 | 710 |  <t hangText="date:">  | 
710 | 711 |  A string instance is valid against this attribute if it is  | 
711 |  | - a valid representation according to the "full-date" production.  | 
 | 712 | + a valid representation according to the "full-date" ABNF rule  | 
 | 713 | + (referenced above)  | 
712 | 714 |  </t>  | 
713 | 715 |  <t hangText="time:">  | 
714 | 716 |  A string instance is valid against this attribute if it is  | 
715 |  | - a valid representation according to the "full-time" production.  | 
 | 717 | + a valid representation according to the "full-time" ABNF rule  | 
 | 718 | + (referenced above)  | 
716 | 719 |  </t>  | 
717 | 720 |  <t hangText="duration:">  | 
718 | 721 |  A string instance is valid against this attribute if it is  | 
719 |  | - a valid representation according to the "duration" production.  | 
 | 722 | + a valid representation according to the "duration" ABNF rule  | 
 | 723 | + (referenced above)  | 
720 | 724 |  </t>  | 
721 | 725 |  </list>  | 
722 | 726 |  </t>  | 
723 | 727 |  <t>  | 
724 | 728 |  Implementations MAY support additional attributes using the other  | 
725 |  | - production names defined anywhere in that RFC. If "full-date" or "full-time"  | 
 | 729 | + format names defined anywhere in that RFC. If "full-date" or "full-time"  | 
726 | 730 |  are implemented, the corresponding short form ("date" or "time"  | 
727 | 731 |  respectively) MUST be implemented, and MUST behave identically.  | 
728 | 732 |  Implementations SHOULD NOT define extension attributes  | 
729 |  | - with any name matching an RFC 3339 production unless it validates  | 
730 |  | - according to the rules of that production.  | 
 | 733 | + with any name matching an RFC 3339 format unless it validates  | 
 | 734 | + according to the rules of that format.  | 
731 | 735 |  <cref>  | 
732 | 736 |  There is not currently consensus on the need for supporting  | 
733 | 737 |  all RFC 3339 formats, so this approach of reserving the  | 
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