.NETISO20022.XSD

ISO20022.XSD

Convert ISO 20022 XSD schemas into a JSON form model.

ISO20022.XSD is a .NET library that converts XSD schemas into JSON, bridging the gap between form data and financial messaging standards. It is the piece that lets a UI render an ISO 20022 message without anyone hand-transcribing a schema into form fields.

What it does

Convert ISO 20022 XSD into a JSON model the form components can render

Install

.NET CLI

dotnet add package ISO20022.XSD

Package Manager

Install-Package ISO20022.XSD

Convert ISO 20022 XSD to JSON

csharp

using ISO20022.XSD;

string xsdFileName = "camt.053.001.10.xsd";
var fileInfo = new FileInfo(xsdFileName);

if (File.Exists(xsdFileName) && fileInfo.Extension.Equals(".xsd"))
{
    XsdToJson xsdLib = new(xsdFileName);
    xsdLib.Convert();
    File.AppendAllText(fileInfo.FullName.Replace(".xsd", ".json"), xsdLib.SchemaJson);
}

Resulting JSON schema

Each element carries its own constraints — occurrence, length, pattern, numeric precision and enumerated values — so validation rules travel with the structure rather than being reimplemented in the UI.

json

{
  "namespace": "urn:iso:std:iso:20022:tech:xsd:camt.053.001.10",
  "schemaElement": {
    "id": "Document",
    "name": "Document",
    "dataType": null,
    "minOccurs": "1",
    "maxOccurs": null,
    "minLength": null,
    "maxLength": null,
    "pattern": null,
    "fractionDigits": null,
    "totalDigits": null,
    "minInclusive": null,
    "maxInclusive": null,
    "values": null,
    "isCurrency": false,
    "xpath": "Document",
    "elements": [
      ...
    ]
  }
}

Next step

Running this in production?

We wrote these libraries and we run them. If you are planning an ISO 20022 migration, we can tell you quickly where the hard parts actually are.

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