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Underlying all of this is the ISO 20022 metamodel – a model of the models. The UML profile is the metamodel transformed into UML. The metadata is transformed into the syntax of messages used in financial networks. The first syntax supported for messages was XML Schema. ISO 20022 is widely used in financial services.
The original message types were developed by SWIFT and a subset was retrospectively made into an ISO standard, ISO 15022. In many instances, SWIFT message types between custodians follow the ISO standard. [1] This was later supplemented by a XML based version under ISO 20022.
The SEPA (Single Euro Payments Area) is a self-regulatory initiative by the European banking sector represented in the European Payments Council, which defines the harmonization of payment products, infrastructures and technical standards (Rulebooks for credit transfer/direct debit, BIC, IBAN, ISO 20022 XML message format, EMV chip cards/terminals).
W3C XML Schema is complex and hard to learn, although that is partially because it tries to do more than mere validation (see PSVI). Although being written in XML is an advantage, it is also a disadvantage in some ways. The W3C XML Schema language, in particular, can be quite verbose, while a DTD can be terse and relatively easily editable.
MARCXML - a direct mapping of the MARC standard to XML syntax; METS - a schema for aggregating in a single XML file descriptive, administrative, and structural metadata about a digital object; MODS - a schema for a bibliographic element set and maintained by the Network Development and MARC Standards Office of the Library of Congress [6]
Document Schema Definition Languages (DSDL) is a framework within which multiple validation tasks of different types can be applied to an XML document in order to achieve more complete validation results than just the application of a single technology. It is specified as a multi-part ISO/IEC Standard, ISO/IEC 19757. [1]
Reports must be submitted within 30 days of a quarter end, in a defined XML format [15] which is defined by an XML schema issued by the EU Commission. The information required is generally consistent with data available through payment systems such as ISO 20022. and Card Transaction Data used by payment card services.
In HTML and XML, a numeric character reference refers to a character by its Universal Coded Character Set/Unicode code point, and uses the format: &#xhhhh;. or &#nnnn; where the x must be lowercase in XML documents, hhhh is the code point in hexadecimal form, and nnnn is the code point in decimal form.