Official XML schemas of the NAV Online Invoice System (Online Számla) 3.0.

invoiceData.xsd, invoiceApi.xsd, invoiceBase.xsd:
  https://github.com/nav-gov-hu/Online-Invoice (src/schemas/nav/gov/hu/OSA), commit cc7a775d (2026-02-13)
common.xsd (NTCA 1.0):
  https://github.com/nav-gov-hu/Common, branch release/common-1.0.x
  (schemas/src/main/resources/xsd/hu/gov/nav/schemas/NTCA/1.0/common/common.xsd)

Change made here: schemaLocation attributes were added to the xs:import
elements so the files can be used for local validation. Nothing else was changed.
Licence: MIT, see LICENCE-NAV.md.
