19. The method of claim 17 , wherein: the reference to the identified glyphlet includes one or more in-band values defined in an encoding standard.
19. The method of claim 17 , wherein: the reference to the identified glyphlet includes one or more in-band values defined in an encoding standard. 20. The method of claim 19 , wherein: the one or more in-band values define one or more target attributes uniquely identifying the identified glyphlet in a collection of glyphlets.