When an attribute is added to a constituent record via batch or import, there are several fields and values associated with the addition of that attribute - these include the attribute category, the value, start and end dates, comments, etc. The set of fields associated with the addition of an attribute are called collection fields. In an import process, these fields are all mapped as a separate group. In some collection fields however, there appear to be additional, extraneous rows of information to map that are not part of the valid information for a given attribute. For example, valid rows include:
<Attribute category> 1 <Attribute category> start date 1 <Attribute category> end date 1
But invalid rows are named "1" with no other information.
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