STCCC provides a comprehensive reporting of a Compliance Gap between a tested EDI document and EDI Implementation Guidelines. Compliance Checking consists of Envelope Compliance, Structural Compliance, and Detailed Segment Compliance. 

 Envelope Compliance is not a transaction set or IG specific. It verifies that the tested document is a valid EDI transaction. Envelope Compliance error often means that the tested file is not an EDI Document. STCCC reports envelope violation and no further checking can be performed until the violation is corrected. 

 Structural Compliance is transaction set and IG specific. It verifies that all mandatory segments are included into the tested document and that all the document segments are valid and placed in the required order. Structural Compliance checking is performed automatically following successful Envelope Compliance checking. STCCC reports structural violation and specifies exact location and contents of the erroneous segment. Since EDI Structural Compliance depends on a relative to each other position of the document segments, STCCC reports only the first structural violation. By correcting this first violation the user may change a status of other suspected violations. No further checking is performed until Structural Compliance is established. 

 Segments Contents Compliance is also transaction set and IG specific. It verifies for each segment that all mandatory elements are included and that all the segment elements are valid and placed in the required order. It also validates elements code values and applicable segment Syntax Notes. Since segment contents violations are not correlated between the segments STCCC includes all the violations into one report.