16. The method of claim 12 , wherein executing the interface to the external validation system and receiving from the external validation system validation results comprises communicating with the external validation system over a computer communication network.
12. The method of claim 11 , wherein executing the document validation system comprises executing an interface to an external validation system and receiving from the external validation system results from the external validation system's validation of the generated instance document including the generated status indicator corresponding to the code via the interface to the external validation system.