A system includes an interface and one or more processors. The interface receives a dataset comprising a plurality of variable length input records, each input record comprising a plurality of fields. The one or more processors compare the input record to a plurality of predetermined record types to determine whether the input record matches one or more of the predetermined record types. Upon a determination that the input record matches one or more of the predetermined record types, the one or more processors determine one or more rules applicable to the input record. The one or more rules are determined based on the predetermined record types that match the input record. The one or more processors apply the one or more rules applicable the input record. The one or more rules determine the quality of the input record based on a structure of one or more of the fields of the input record and/or a value of one or more of the fields of the input record. The one or more processors determine a data quality of the dataset, the data quality determined based at least in part on the result of applying the one or more rules applicable to the input record.