Which transformer can you use to easily set attribute values to null?

Which transformer can you use to easily set attribute values to null?

• A. AttributeExposer
• B. AttributeCreator
• C. AttributeFilter
• D. AttributeEncoder

Answer: (B)

Setting a Null value for an attribute in FME is most easily done with the AttributeCreator, because this transformer lets you assign or reassign attributes directly, including a Null value. You specify the attribute you want to set and give it a value; leaving that value blank (or selecting Null) assigns a true missing value that downstream transformers can recognize as null. This makes the attribute truly missing rather than an empty string or zero, which is important for data quality and logic that checks for nulls. Other transformers aren’t designed for this direct value assignment. AttributeExposer is about exposing or duplicating attributes (making them visible or renaming them), not about setting their values to null. AttributeFilter is used to route or discard features based on conditions, not to modify the attribute values themselves. AttributeEncoder converts attributes into a serialized string form, which doesn’t help with setting an attribute to null.

Setting a Null value for an attribute in FME is most easily done with the AttributeCreator, because this transformer lets you assign or reassign attributes directly, including a Null value. You specify the attribute you want to set and give it a value; leaving that value blank (or selecting Null) assigns a true missing value that downstream transformers can recognize as null. This makes the attribute truly missing rather than an empty string or zero, which is important for data quality and logic that checks for nulls.

Other transformers aren’t designed for this direct value assignment. AttributeExposer is about exposing or duplicating attributes (making them visible or renaming them), not about setting their values to null. AttributeFilter is used to route or discard features based on conditions, not to modify the attribute values themselves. AttributeEncoder converts attributes into a serialized string form, which doesn’t help with setting an attribute to null.