# Guiding questions

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**Purpose:** Define the breadth and depth of the catalogue to balance discoverability, transparency, and accessibility.
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1. **Scope & Functionality of the Catalogue**

* *What is the appropriate scope of the catalogue (minimal index or rich metadata repository)?*
* *Should offerings be accessible to non-participants (public visibility) or only to registered participants?*
* *What level of detail in metadata is required to ensure both discoverability and trustworthiness?*
* *Will the catalogue manage service offerings, support dynamic data transactions, and enforce access management for offerings?*

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**Purpose:** Clarify who manages the catalogue and how access rights are assigned, authenticated, and authorized.
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2. **Governance & Access Control**

* *Who governs the catalogue (central authority vs. distributed responsibility)?*
* *How should access be managed, open, tiered (role-based), or restricted to use-case participants?*
* *What mechanisms should be in place for authentication and authorization when publishing and discovering offerings?*

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**Purpose:** Decide whether the catalogue operates as a central service, a federated network, or a hybrid model.
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3. **Catalogue Architecture (Centralised vs. Decentralised)**

* *Should a federated model, central broker model, or hybrid be adopted?*
* *If federated, how should synchronisation work across distributed catalogues? (push, pull, gossip protocols).*
* *If centralised: who operates and funds the central catalogue service, and what are the implications for neutrality and inclusivity?*
* *How will cross-space interoperability for discovery be ensured (common APIs/profiles, conformity tests)?*

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**Purpose:** Adopt common metadata standards and align with EU infrastructures to ensure cross-data-space discoverability.
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4. **Interoperability & Standards**

* *Which metadata standards (DCAT v3, ODRL, FAIR) should be mandatory?*
* *How should the catalogue align with EU infrastructures (data.europa.eu, national catalogues, sectoral hubs)?*
* *How to ensure cross-data-space discoverability while maintaining control over sensitive offerings?*

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**Purpose:** Establish processes for managing, updating, and preserving catalogue entries with sustainability in mind.
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5. **Offering Lifecycle & Sustainability**

* *How should providers manage the lifecycle of offerings (versioning, updates, retirement)?*
* *Should sustainability attributes (e.g. environmental impact, CO₂ data quality) be part of metadata descriptions?*
* *How do we ensure long-term persistence of identifiers (PIDs) to support reuse across data spaces?*

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**Purpose:** Ensure catalogue entries are reliable, searchable, and validated to build user confidence and usability.
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6. **User Experience & Trust**

* *What mechanisms ensure offerings are searchable, transparent, and reliable?*
* *Should a data-space-wide search portal be provided for non-technical users?*
* *How do we build confidence in entries (validation, certification, provenance)?*
* *Will verification links be exposed for trust decisions?*


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