# Glossary¶

General model

Any DNN model with no shape restriction on input and output data. For example, classification model, objective detection model, next token prediction model, regression model.

Embedding model

A DNN with any shape input (image/text/sequence) and an output ndarray in the shape [B x D], where B is the batch size same as the input, and D is the dimension of the embedding.

Unlabeled dataset

A DocumentArray-like object, filled with Documents with .content.

Labeled dataset

A DocumentArray-like object, filled with Documents with .content, where documents also contain some kind of labeles that can be used for training an embedding model.

Class dataset

A kind of labeled dataset, where each Document has a class label stored in .tags['finetuner_label'], and does not have .matches

Session dataset

A kind of labeled dataset, where each root Document contains .matches and no label; its matches contain label saved under .tags['finetuner_label']. That label can be either 1 (for a match similar to its reference Document) or -1 (for match dissimilar from its reference Document)

Tuner

A component in Finetuner. Given an embedding model and labeled dataset, it trains the model to fit the data.

Tailor

A component in Finetuner. Converts any general model into an embedding model;

Labeler

A component in Finetuner. Given unlabeled dataset and an embedding model or general model, labeler asks human for labeling data, trains model and asks better question for labeling.