44. The computer readable medium encoded with the computer program of claim 43 , wherein: parsing the string to identify a reference includes interpreting a plurality of in-band values to define the identified reference.
44. The computer readable medium encoded with the computer program of claim 43 , wherein: parsing the string to identify a reference includes interpreting a plurality of in-band values to define the identified reference. 46. The computer readable medium encoded with the computer program of claim 44 , wherein: the plurality of in-band values define the identified glyphlet.