The PLY file format, also known as the Polygon File Format or Stanford Triangle Format, is a computer file format designed to store three-dimensional data, most notably data from 3D scanners. It supports a relatively simple file structure that can represent a single object as a collection of polygons. The format is designed to be both easy to parse and flexible enough to represent a variety of geometric data. PLY files can store a variety of properties for each vertex, such as color, normals, texture coordinates, and other custom data. The format supports both ASCII and binary encodings, allowing for human readability or more compact storage. PLY files are commonly used in 3D modeling, computer graphics, and scientific visualization applications. The format is extensible, allowing for the addition of custom properties and elements beyond the standard vertex and face definitions. This makes it a versatile choice for representing complex 3D models with rich data.