(1) A text file that contains data identified with an embedded tag. See
tagged text and
XML.
(2) A multimedia file that contains a description of its content. See
metadata.
(3) Data identified for training AI systems. An image or video is labeled if its file name is descriptive of the content. However, the vast majority of data traversing the Internet is not. Unlabeled data can be labeled manually or by machine. See
AI and
large language model.