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The DateFormatter transformer will replace missing attributes with the current date.
If this is not the desired behavior,use a NullAttributeReplacer before the DateFormatter to replace the null value with a proxy value that will not be formatted (ie."null").
After the DateFormatter,use a StringReplacer to replace the proxy value with an empty string.
This process works only if a single attribute is chosen in the DateFormatter.If multiple attributes are chosen and any of them is null,then none of the attributes will be formatted.
FME 2014 adds support for null values.The DateFormatter will replace null values with the current data and time.The StringReplacer mentioned above can replace the proxy value with an actual null.
Working with Database Date | Time attributes
Including Dates into the Names of Output Files or Features
Converting time and date fields to local timezones or for daylight savings
Regular expressions that work in one parameter,fail in another
Choosing an attribute encoder/decoder transformer
Apply One Expression to Many Attributes | ExpressionEvaluator
Transposing Data for Business Intelligence
Calculating a Running Total or Cumulative Sum | StatisticsCalculator
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