Stuzza is the financial organisation in Austria. The home page of the organisation is located at: link
The available validation services for the payment types specified by the Stuzza are based on pure ISO 20022 schemas (xsd) without any modifications. In addition to the schema, the service also contains the business rule checks derived from the implementation guides published by the Stuzza. The detailed information about the versions of the schemas and implementation guides can be found by selecting an item from the list below.Read more
XMLdation's validation tool links to the following, service specific wiki regarding some of the validation rules: https://wiki.xmldation.com/Support/Stuzza
However, some business rules specified in the Stuzza implementation guide are derived from general level specifications, like ISO20022 or EPC, and in these cases the wiki pages made for these organisations are often used instead.