When inputting local data, how can the file name be outputted in the final data?

The correct answer reflects the practice of outputting data in a form that retains information about the original source file. When inputting local data into an Alteryx workflow, including the full file path allows users to trace back the data to its original location on the file system. This can be particularly useful for data tracking, ensuring that users know exactly where the data originated, which can aid in data validation and audit processes.

Providing the full path helps maintain clarity about the source of the data, especially when multiple datasets are utilized or when the same dataset might be represented in different locations. It enhances the context for analysts and stakeholders who may need to reference or verify the data's origin.

In contrast, the other options focus on different types of identifiers or metadata that do not directly convey the file's specific location. For instance, a key identifier typically relates to an attribute within the dataset used for unique identification purposes, a timestamp would represent the time at which the data was collected or processed, and a metadata tag is used to describe certain characteristics or attributes of the dataset. While all these options can provide useful information, they do not serve the same purpose as the full file path in the context of tracking and identifying the source of the data.