1. A computer-implemented method of validating an application of geometric dimensioning and tolerancing (“GD&T”) in a drawing, the method comprising: identifying illegal symbols, modifiers, or both that are contained in a GD&T feature control frame; identifying symbols, modifiers, or both that are illegally used or improperly located within a feature control frame; verifying that links between features and the GD&T feature control frames are correct; verifying that tolerances included in the GD&T feature control frames are related to features that can be defined by magnitude and shape; verifying that defined datums follow predetermined design practices; verifying that tolerances included in the GD&T feature control frames are either 1) refinements that are relative to other GD&T feature control frames, or 2) refinements that are relative to location or size tolerances; verifying that methods used to attach the GD&T feature control frames to the features are correct; verifying that all of datums utilized in the feature control frames of the drawing are actually applied to components within the drawing; and verifying that datums that are defined within the drawing are utilized in the GD&T control frames.