Methods and systems are provided for sequencing of input prompts for data structure completion. The method includes: providing a data structure including object classes with typed attributes and rules defining constraints to be met by a data instance of a data structure to meet a regulation body and building a data instance of the data structure by prompting user input via a user interface. The method includes: selecting a working object instance from the top of a stack of object instances; gathering applicable rules for the working object instance with missing required facts in the form of object attributes, including any related rules where a new object class is required; and sequencing input prompts in a user interface of a complex form to obtain the required facts in the form of missing object attributes.