Which term identifies a specific category within a larger classification?

The term that identifies a specific category within a larger classification is a "data tag." Data tags are used to label and categorize specific types of data, making it easier to organize, search, and filter information within a broader data set. Tags serve as metadata, providing context and additional details that help in identifying the nature and relevance of the data, thus enhancing data management and retrieval processes.

In contrast, declassification pertains to the process of removing the classified status of information, which is not relevant to categorization. Data format refers to the structure or layout of data, such as file types or encoding, rather than a means of categorization. A bigot, while a descriptor for a person with strong prejudices, does not relate to data classification at all. Therefore, data tag is the most appropriate answer as it directly involves categorization within a larger framework.