Evaluating a source document for compliance with a rule set that represents contextual guidelines to which the source document must conform. The rule set comprises a rule node that includes a context that is compared to the source document to identify candidate nodes for further evaluation. Each rule node also includes a descendant pattern node that includes a pattern matching expression representing at least one aspect of the contextual guidelines to which the source document must conform. Preferably a match between a candidate node and the pattern matching expression indicates a nonconformance to the contextual guideline(s), and a predefined action is initiated. Predefined actions include reporting the nonconformance, and automatically repairing the nonconformance through script code.