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SCORM 2004 Timestamp Requires Milliseconds with TDZ (Time Zone Designator).

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Where does this problem show up?

This timestamp format problem is relevant to SCORM 2004 API calls when creating interactions and comments: cmi.interactions.n.timestamp and cmi.comments_from_learner.n.timestamp.

What's a Time Zone Designator (TDZ)?  

Suffix at the end of a timestamp in the form Z for UTC or +hh:mm or –hh:mm.

Where's the confusion? 

Timestamps can take a form "2009-07-25T03:00:00".  So you would naturally think that you could append a TDZ to the end like "2009-07-25T03:00:00Z" or "2009-07-25T03:00:00+05:00", right?  Well, the SCORM 2004 spec puts an extra requirement on you when specifying a TDZ.

From SCORM® 2004 4th Edition Run-Time Environment (RTE) Version 1.0, page RTE-A-16 under "time(second,10,0)"

If TZD is defined, then hh:mm:ss.s shall also be defined, although they may be all zeros.

So

  • "2009-07-25T03:00:00+05:00"    WRONG
  • "2009-07-25T03:00:00.0+05:00"   OK
  • "2009-07-25T03:00:00Z    WRONG
  • "2009-07-25T03:00:00.0Z"   OK

But the spec has an example that shows TDZ without the milliseconds -- what gives?

The spec shows a set of examples timestamps, two of which are invalid.  These bad examples are contrary to the spec definition and fail in the actual SCORM Conformance test suite.

Example: 
• 2009
• 2009-07-25T03:00:00
• 2009-07-25T03:00:00-03:10
• 2009-07-25T03:30:35.5+05
• 2009-07-25T03:00:00Z'
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