The C3D file format defines a method of recording information about, or associated with, the data contained within the file.  This information is stored in objects called “parameters” which can be floating-point, signed or unsigned integers and bytes, or ASCII values.  Parameters are kept in collections depending on their use – these collections are called “groups” and every parameter is a member of a group.

Individual parameters have names, and are generally referred to by placing the group name first separated from the parameter name by a colon e.g., GROUP:PARAMETER.