Early 2019 the VNG (Vereniging van Nederlandse Gemeentenhe / Dutch association of municipalities) cooperated to implement support for the then, prototype, Zaak en Document Systeem 2.0. It was shown that ZDS 2.0 could be integrated with SIA, and that cooperation between Amsterdam and the VNG was possible and productive.
Since the conclusion of this project both systems have evolved significantly to the effect that the integration no longer works. In particular, the integration uses the "zero" version of the SIA API which is no longer supported, and therefore the implementation was removed from the master branch of SIA.
Results of collaboration are archived on a protected branch in Github: https://github.com/Amsterdam/signals/tree/feature/zds