Why does OBJECTID appear in the output in step 5?

• A. The Parks dataset defines this attribute in its MITAB schema
• B. The CommunityMap [FILEGDB] Schema Source has a table named Parks that has this column.
• C. All GML feature types must contain this attribute.
• D. All feature types, regardless of format, must contain this attribute.

Answer: (B)

ObjectID appears because it is defined by the source schema you’re using. The CommunityMap [FILEGDB] Schema Source includes a Parks table that has an OBJECTID column, and FME preserves that schema attribute in the output. So, in step 5 you see OBJECTID simply because the schema source defines it. This isn’t a universal requirement for all formats (MITAB, GML, or other formats don’t mandate an OBJECTID), but it is present here due to the specific FILEGDB schema you loaded.