19.420 presentation source - defining the possible values

We failed to define the values for the presentation source attribute. The current text reads:

The presentation:source attribute specifies whether the current date/time or the fixed content of the field declaration is displayed.

The values are: fixed or current-date.

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I propose:

• fixed: display content of the attribute's <presentation:date-time-decl> element

• current-date: displays the current value of the <dc:date> element