The ministry service catalog is not a parallel database alongside the central gov.cz portal. It is a presentation and integration layer on top of the official open government data, one that puts services into the context of a particular public authority.
The core principle is the separation of the source data, the open data published by the state, from the presentation layer of the ministry website. The website keeps no editorial copy of the services of its own and works instead with a data model that is updated automatically.
Architecturally the catalog is a standalone application component integrated into the existing web portal. It works with a local data structure synchronized from the source JSON datasets.
The key decision was how to model the relationships between agendas, services, and public authorities. The catalog selects only those services where the authority in question is identified as the provider or the registering body, which produces an exact set of relevant entries.
This approach delivers technical sustainability, a minimum of manual work, alignment with the official registers, and room for further development without touching the source data.
How the catalog works in practice and what it brought to the ministry and to the public is described in the case study The Ministry of the Environment service catalog: state services at a glance, without duplicate data.