ABCD

The three attributes of abcd2:Gathering-SiteCoordinates @begin, @end and @original need to be reworked.

Documentation from abcd2:Gathering-SiteCorrdinates: "Attributes are available for original data and for the beginning and end of a sequence."

There is no description of how they are to be used, no description and no examples. Judging from the use of attributes for other elements, this is probably supposed to be a binary flag where the suggested values could be "true" or "false". And while this might work for @original, it stands to reason that it is the best way to mark a sequence using @begin and @end. What about the intermediate coordinates of the sequence? Wouldn't it be more useful to have an attribute @sequence as with abcd2:PreviousUnit-@sequence orabcd2:GatheringAgent-@sequence