(By Hannah J. Haynie): "This feature focuses on whether the basic word order(s) of main clauses are possible in subordinate clauses. A ‘yes’ response for this feature indicates that subjects, verbs, and objects occur in the same order in subordinate clauses as in main clauses. For example, the order between ‘woman’, ‘man’, and ‘chases’ is the same in the simple clause the woman chases the man as in the subordinate clause of I think that the woman chases the man in English, and this feature asks if it is the same in target languages. In languages with flexible word order it is sufficient for a 1 if all pragmatically unmarked main clause orders are possible in subordinate clauses, even if there are additional word order alternatives in subordinate clauses that are not available in main clauses. Subordinate clauses involving reported speech (e.g. He said that the woman chases the man.) should be disregarded."
The term "main clause" seems to correspond to the Grammaticon concept "independent clause". The closest counterpart of "basic word order" in the Grammaticon is "dominant order".