Which of the following is a mandatory field for ISO datasets?

The mandatory field for ISO datasets is the Title. In the context of ISO 19115, which is the standard for geographic information metadata, the Title serves as a fundamental identifier for the dataset. It provides a clear and concise naming reference, helping users and systems quickly understand what the dataset is about. Having a title is essential for cataloging, searching, and referencing datasets in databases and repositories, fulfilling basic metadata requirements.

While fields like Sample Rate, Format, and Source are important for providing additional context and details about the dataset, they are not classified as mandatory. Sample Rate might be relevant for temporal datasets, Format can describe how the data is encoded, and Source would indicate where the data came from, but none of them serve the foundational role that the Title does.