Knowledge base developers are often uncertain as to how to apply varying embargo terms, as the same terms can be used by different content providers in different ways.
Embargo terminology is complex, particularly in instances of a "1-year embargo", which might mean the previous 12 months are not available, or that the current (or previous) calendar year is not available (i.e., from January of a certain year to the present). Users cannot know with certainty if the article they seek will be found in a given database when the issue date falls in or near the range of the embargo period.
Consistent usage of the ISO 8601 duration syntax, which allows multiple types of embargo to be described, can mitigate this problem. See Section 188.8.131.52 for details.
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