README

ProRock 🤟

Schema-typed XML for Delphi. Generate exact Delphi classes from XSD and WSDL, parse and write XML through them, call SOAP services with them.

When the schema changes, regenerate, don't re-patch.

A schema changes: a new e-invoicing version, an ISO 20022 release, a service adding fields. Hand-written or hand-patched mappings then have to be found and fixed one by one. With ProRock you regenerate the units, and the compiler shows exactly what changed.

Proven on real schemas:

• HL7® FHIR® R4 - all 146 resource types from the official schemas: a Bundle of 1,000 Patients read in 0.1 s, narratives written back as they were (sample)
• Excel workbooks - SpreadsheetML from ECMA-376: an invoice read, edited and written back with everything Excel put in it; Excel opens it and recalculates (sample)
• SOAP services - the EU VIES VAT service, WS-Security, client certificates (quick start below)

Two parts:

• ProRock - the runtime library: open source (Apache 2.0), pure Delphi source, no dependencies beyond the RTL
  • Basite - the core: plain Delphi objects described once by their metadata (MetaBank) - nested objects created and freed with their parent, presence of every value; independent of any data format, the base for Xmlite and later Jsonite
  • Xmlite - XML parsing and serialization to and from plain Delphi objects, namespace- and schema-aware, without a DOM
  • Soapite - SOAP 1.1 / 1.2 clients on top of Xmlite, generated from WSDL
• ProRocket Lite - the code generator: XSD/WSDL in, Delphi units out, in a GUI and from the command line - friendly to scripts and AI coding assistants. Free for any use, including commercial

Download ProRocket-Lite.zip (Windows 64-bit, always the newest release; SHA-256 in the release notes)

Documentation

The full documentation is at prorock.rocks (searchable):

Quick start: a SOAP client from a WSDL

1. Open ProRocket Lite, add the WSDL (here checkVatService.wsdl, the EU VIES VAT number service), click Generate - or from the command line: ProRocketCli.exe checkVatService.wsdl.
2. You get two units: the types (ProRock.Xmlite.Schema.CheckVatService) and the client (ProRock.Soapite.CheckVatService).
3. Call the service. Pass the endpoint: the default is the WSDL's soap:address, and VIES still declares http:// there.

uses ProRock.Soapite.CheckVatService;

var service := TCheckVatService.Create('https://ec.europa.eu/taxation_customs/vies/services/checkVatService');
try
  var request := TCheckVatE.Create;
  try
    request.CountryCode := 'IE';
    request.VatNumber := '6388047V';

    var response: TCheckVatResponseE;
    var error: TSoapiteError;
    if service.TryCheckVat(request, response, error) then // never raises for service or network failures
      try
        Writeln(response.Name, ' - valid: ', response.Valid);
      finally
        response.Free;
      end
    else
      Writeln('failed [', error.Code, ']: ', error.Message);
  finally
    request.Free;
  end;
finally
  service.Free;
end;

The same from an XSD, the project setup, timeouts, authentication and faults: getting started and Soapite.

Installation

ProRock is a pure source library: no installation, no design-time packages, no component registration. Clone or download the repository, add its Source folder to your project's search path (ProRock 1.4 and earlier: the repository folder itself), use the units you need.

Delphi 10.3 Rio to 13 Florence, Win64 and Win32; all units compile for Android (Delphi 13), running on a device is not verified yet. The Samples folder has one group project with nine samples - an Excel workbook, FHIR resources, Office document properties, EU VIES, WS-Security, client certificates and more.

Known limitations and notes

Coverage grows through real-world schemas. Reading and writing back are exact for what a schema describes, also for large schemas: FHIR R4 and the OOXML SpreadsheetML/DrawingML schemas generate units that compile and round-trip - Office's own extensions and FHIR's XHTML narratives included.

Not covered yet:

• elements standing in for their substitution group head
• xsi:nil
• schemas without a target namespace
• facets (patterns, lengths, ranges) are not validated

What comes next: ROADMAP. The full list, with notes on decimals, string types and server error texts: Limitations and notes.

Development

Changes are listed in the CHANGELOG, plans in the ROADMAP. Security issues: see SECURITY.md.

Since October 2026, development is assisted by Claude Code (Anthropic): it helps with implementation, tests and generator fixes. Design, decisions and verification remain the author's.

Feedback, real-world schemas that do not work yet, and contributions are welcome - see CONTRIBUTING.md.

If ProRock is useful to you, at least smash the ⭐ Star - it costs nothing and helps other Delphi developers find it. And if you'd like to do more, you can support the project. Thank you! 🤟

License

ProRock is licensed under the Apache License 2.0. ProRocket Lite is a free closed-source tool with its own license. The generated metamodels are derived from W3C, IBM and Microsoft schemas; their notices are in THIRD-PARTY-NOTICES.md.

Have fun, and let's ProRock! 🤟