An OPT file, or Opticon file, is a type of load file used in e-discovery to associate images with their corresponding records. It acts as a cross-reference file, mapping a unique document identifier (like a Bates number) to the file path of its associated image file (e.g., TIFF or JPG). It also specifies where documents begin and end (document breaks) and can contain volume information.

A. Text extraction is typically handled by DAT files (which contain metadata and extracted text) or separate text files referenced in a load file, not the OPT file itself.

C. Security settings are managed within the Relativity platform through users, groups, and permissions, and are not part of an OPT load file.

D. Index configuration refers to the settings for a dtSearch or Analytics index, which are configured within Relativity and are unrelated to an OPT file's function.

1. Relativity Documentation. "Load file formats for RDC". Relativity Server 2023 Documentation. Accessed May 2024. (This page details the specifications for various load file types, explicitly defining the Opticon (.opt) file as an "image cross-reference file" and outlining its required fields.)