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If Input schema must match target schema is chosen for Schema Type ( schema_type = "TEST" in Python), the schema (field definitions) of the input datasets must match that of the target dataset for the features to be appended. To combine, or planarize, feature geometries, use the Union tool. All features from both the input feature class and the target feature class will remain intact after the append, even if the features overlap. This tool will not planarize features when they are added to the target dataset. The Field Map parameter can only be used if Use the Field Map to reconcile schema differences is chosen for Schema Type. The Field Map parameter in the Append tool can be used to control how the attribute information from the input dataset fields is transferred to the target dataset. For example, several tables can be appended to an existing table, or several rasters can be appended to an existing raster dataset, but a line feature class cannot be appended to a point feature class. This tool can append point, line, or polygon feature classes, tables, rasters, annotation feature classes, or dimensions feature classes into an existing dataset of the same type. Use this tool to add new features or other data from multiple datasets into an existing dataset. To combine input datasets into a new output dataset, use the Merge tool. Input datasets can be feature classes, tables, shapefiles, rasters, annotation or dimensions feature classes. Appends multiple input datasets into an existing target dataset.