GB/T 27926.4-2021Financial services - Universal financial industry message scheme - Part 4: XML Schema generation (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for Standardization Work Part 1.Structure and Drafting Rules of Standardization Documents"

Drafting.

This document is part 4 of GB/T 27926 "General Messaging Plan for Financial Services and Financial Industry". GB/T 27926 has been released

The following parts.

---Part 1.Metamodel;

---Part 2.Overview of UML;

---Part 3.Modeling Guidelines;

---Part 4.XMLSchema generation;

---Part 5.Reverse Engineering;

---Part 6.Message transmission characteristics;

---Part 7.Registration;

---Part 8.ASN.1 generation.

This document replaces GB/T 27926.4-2011 "Financial Services Financial Industry General Messaging Scheme Part 4.XML Design Rules",

Compared with GB/T 27926.4-2011, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) Added "Background" (see Chapter 4);

b) Added "Message Set Conversion Rules" (see Chapter 5);

c) Deleted "UML to XML conversion", "XML schema features adopted", and informative appendix "XML acronyms" (see

Chapter 3, Chapter 4, Appendix A of the.2011 edition).

The translation method used in this document is equivalent to the adoption of ISO.20022-4.2013 ``Financial Services and Financial Industry General Messaging Program Part 4.

XMLSchema Generation".

The Chinese documents that have consistent correspondence with the normatively cited international documents in this document are as follows.

---GB/T 27926.1-2021 General Messaging Scheme for Financial Services and Financial Industry Part 1.Metamodel (ISO.20022-1.

2013, IDT)

This document was submitted by the People's Bank of China.

This document is under the jurisdiction of the National Financial Standardization Technical Committee (SAC/TC180).

Drafting organizations of this document. China Financial Electronics Corporation, China Foreign Exchange Trading Center and National Interbank Funding Center, China Industry and Commerce

Bank Co., Ltd., Agricultural Bank of China Co., Ltd., China Construction Bank Co., Ltd., and the People's Bank of China in Chongqing

Management Department, China UnionPay Co., Ltd., China National Debt Depository and Clearing Co., Ltd., Cross-border Interbank Payment and Clearing Co., Ltd.,

China Merchants Bank Co., Ltd., China Securities Depository and Clearing Co., Ltd., China Everbright Bank Co., Ltd.

Introduction

GB/T 27926 defines a scalable and systematic process to ensure the consistency of message descriptions in the entire financial industry. The purpose is fine

Describe the externally observable method of message delivery in the financial industry accurately and completely. This method can be independently verified with running message delivery.

The production of ISO.20022 is based on open technical standards. Usually, the development speed of technical standards is faster than the industry itself. because

Therefore, the document adopts a model-driven approach, in which the industry message collection model can be independently separated from the development of message technology.

ISO.20022 emerged with the widespread commercial adoption of the World Wide Web. Extensible Markup Language (XML) in the form of document representation on the Web

The de facto standard appeared and became the first grammar of ISO.20022.

GB/T 27926 consists of the following parts.

---Part 1.Metamodel;

---Part 2.Overview of UML;

---Part 3.Modeling Guidelines;

---Part 4.XMLSchema generation;

---Part 5.Reverse Engineering;

---Part 6.Message transmission characteristics;

---Part 7.Registration;

---Part 8.ASN.1 generation.

Compared with GB/T 29726-2011, 5 parts were revised and 3 parts were added. The new parts are.

---Part 2.Overview of UML;

---Part 6.Message transmission characteristics;

---Part 8.ASN.1 generation.

8 parts of GB/T 27926-2021 "General Message Scheme for Financial Services and Financial Industry" are equivalent to 8 parts of ISO.20022-2013

part.

In addition to the message technical standards, the modeling process is further refined into three layers, which is why this document is based on four layers. scope layer, concept

Layer, logical layer and physical layer. The first, second and third layers are described in the Unified Modeling Language (UML) because it is widely supported

And supports multi-layer abstraction. The models created according to this document are independent of technology, as they do not require any specific physical expressions

Or realize. These models are designed to describe all parts of the message exchange and constitute the definition of the agreement between the participants in the message exchange. This document defines

It defines a method that describes the process of modelers creating and maintaining these models.

ISO.20022 aims to build a standardized and complete message development plan to improve the efficiency of information exchange and development in the financial industry and reduce message movement.

The maintenance cost of the bank is planned to be composed of the following parts.

---Part 1.Metamodel. The meta-models of all models and libraries are described in the Meta Object Tool (MOF), the purpose is to introduce the modeling method

Method summary, summary of library content, abstract description of the input and output of the library acceptable to the registrar.

---Part 2.Overview of UML. Covers UML profile, which is the basis of a general UML, which is defined by this standard

Specific subset (used when UML is selected to define the model). The purpose is to describe the definition, overall structure, and meta-model of the extension set

Metaclass attributes involved in each layer to UML implementation, so that message developers can better understand the UML extension set and its various levels

UML implementation.

---Part 3.Modeling Guidelines. Describes the modeling method used to generate the model for this document. The purpose is to explain the message model to the modeler

The steps of model establishment ensure the consistency of business components/elements, message components/elements, business transactions and message definitions. This part

It is aimed at the concrete realization of the business of modeling in Part 1 and Part 2.

---Part 4.XMLSchema generation. The purpose is to introduce XMLSchema generation rules, which are used to transform the logical layer model

It is the physical layer of the grammar description.

---Part 5.Reverse Engineering. Covers logical model alignment and reverse engineering of existing message syntax. The purpose is to introduce reverse engineering

The main stages in the process and the inputs, outputs and activities of each stage.

---Part 6.Message transmission characteristics. The purpose is to introduce the parameters of the message transmission system required for business transactions and message definitions.

Confirm the parameter difference in different transmission modes of the message.

---Part 7.Registration. Describes the process of management model registration and physical grammar realization. The purpose is to indicate the applicant institution and registration

Responsibilities and registration process of both parties.

---Part 8.ASN.1 generation. This part gives the ASN.1 grammar generation rules, so that the logical layer model can be integrated through ASN.1

Converted to physical layer description.

General Message Solution for Financial Services and Financial Industry

Part 4.XMLSchema generation

1 Scope

This document serves as a supplement to the ISO.20022 meta-model. The XML grammar conversion rules applied by the ISO.20022 registration authority will conform to

The message definition of ISO.20022 is converted into XML mode, which is used to describe and verify the XML message.

This document specifies the rules for the transition from the third level to the fourth level. It is a deterministic transformation, meaning that for a given

The message defines that the generated XMLSchema is completely predictable. There is neither manual input of the conversion itself nor the conversion result.

Manual adjustment of the fruit.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations

Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to

This document.

ISO.20022-1 General Messaging Scheme for Financial Services Financial Industry Part 1.Metamodel (Financialservices-Universal

financialindustrymessagescheme-Part 1.Metamodel)

3 Terms and definitions

The terms and definitions defined by ISO.20022-1 apply to this document.

4 background

XML is a standard defined by W3C (World Wide Web Consortium), and the standard ISO.20022 message definition (ie grammar) can be expressed in XML.

XML leaves a lot of freedom for its correct use in specific applications. Therefore, just stating that XML is used is not enough to guarantee

Predictability also needs to explain how to use XML.

This document contains a series of XML design rules that define how the message definition is converted to ISO.20022XML

Schema.

A valid XML document (hereinafter referred to as "XML instance" or "instance") is all that has an associated description and conforms to the description

The constraint XML document. In this example, the description of the association is derived from the message definition.

This document also describes how to convert the message set to XML by specifying how to convert the message definition to XMLSchema

Schemas. XMLSchema will use the validating XMLSchema parser to automatically verify whether the given XML instance conforms to the message specification

Constraints (or a subset of constraints) described in the definition.

This document is limited to explaining how to map a given message definition to XML, and does not explain how to create a message definition. For related information, see

ISO.20022-3.