1. A computer-implemented method comprising: (A) identifying a document including a first coding having a first feature encoding a first concept, the first coding being associated with a first code and first data; (B) rendering, by a processor, the first data to have a visual characteristic that is based on the first feature, without rendering the first code; (C) receiving a first indication from a user of whether the rendering is accurate; (D) identifying, based on the first indication received from the user, a verification status of the first coding, wherein the verification status of the first coding indicates whether the first data represents the first concept, comprising: (D)(1) if the first indication that the rendering is accurate, then identifying a verification status of the first coding indicating that the first coding is accurate; and (D)(2) otherwise, identifying a verification status of the first coding indicating that the first coding is inaccurate; and (E) if the verification status of the first coding indicates that the first coding is inaccurate, then modifying the first feature of the first coding.