This directory contains summaries of particularly notable systems on the topic of inferring metadata and other information from files and other resources.

These are systems aimed at extracting metadata primarily by being designed to recognize specific file formats. Whatever inference they may do is limited to hard-coded, built-in knowledge about data types.

• FITS: File Information Tool Set (FITS)

These are systems that go beyond simple metadata extraction, and infer content information using machine learning, artificial intelligence, or human intelligence (e.g., via crowd sourcing or other means).

• DeepDive: data management system that supports extraction, integration, and prediction