A mutex can be of an (error checking type).Logical formLearned from2 sentences. An option may suppress an (error checking).Logical formLearned from2 sentences. An input may undergo a checking.Logical formLearned from2 sentences. A (checking account number) can be valid.Logical formLearned from2 sentences. Issues may pervade a system checking.Logical formLearned from2 sentences. A complexity may pertain-to a (checking problem).Logical formLearned from2 sentences. (Model checking) can be successful.Logical formLearned from2 sentences. Checkings can be tedious.Logical formLearned from2 sentences. A checking can be required.Logical formLearned from2 sentences. A (document type conformance checking) can be rigorous.Logical formLearned from2 sentences. Well-formedness may undergo a checking.Logical formLearned from2 sentences. Systems may be based on (type checkings) of documents.Logical formLearned from2 sentences. Programmers can be with checking.Logical formLearned from2 sentences. Some problem may be identified during checking.Logical formLearned from2 sentences. An accuracy may be obtained from a (document type conformance checking).Logical formLearned from2 sentences.