DAC7 platform reporting validator — independently written lite controls, XSDHub, 2026-11-06. Poland national schema publications: Ministerstwo Finansów (MF), source and dates per /dac7-pack/manifest.json; MF conditional reuse https://www.gov.pl/web/finanse/ponowne-wykorzystywanie. Original publications unchanged; dependency locations mapped in memory to local copies for compilation. MF does not endorse or take responsibility for XSDHub processing. OECD terminology attributed to OECD; no new translation of OECD materials. No DE/FR/RO/HR schema pack, standalone OECD/ISO code list, Schematron or plugin supplied. Existing libxml2-wasm 0.7.2 / libxml2 engine: MIT notices /vendor/libxml2/LICENSE and /vendor/libxml2/LICENSE.libxml2 retained. OECD (2022), Model Rules for Reporting by Digital Platform Operators: XML Schema User Guide for Tax Administrations, https://www.oecd.org/tax/exchange-of-tax-information/model-rules-for-reporting-by-digital-platform-operators-xml-schema-user-guide-for-tax-administrations.pdf. Attribution of terminology; no endorsement, new guide translation or standalone OECD software distribution.