Add blog article about ARP + video

docs/_blog/2025-10-13/dataverse-cedar-and-ro-crate-the-building-blocks-of-arp.md

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+---
+title:  "Dataverse, CEDAR and RO-Crate: The building blocks of ARP, the federated research data repository of Hungary"
+author: ["Balázs E. Pataki"]
+email: "pataki@sztaki.hu"
+date: 2025-10-13
+related_pages:
+    use_cases: [aroma, dataverse, ] # should match items in pages/use_cases
+---
+
+
+The [ARP Adatrepozitórium Platform](http://researchdata.hu/en) (Data Repository Platform) is a national initiative of the
+[Hungarian Research Network (HUN-REN)](https://hun-ren.hu/home), led by [SZTAKI (HUN-REN Institute for Computer
+Science and Control)](https://sztaki.hun-ren.hu/en), to build a multidisciplinary repository system capable of hosting the
+scientific data output of the Hungarian research community. ARP is a federated service that
+collects data from its own Dataverse repository as well as other institutional data repositories in
+Hungary to establish a European Open Science Cloud (EOSC)-compliant research
+infrastructure.
+
+<img src="arp_services_en.png"
+alt="ARP is built integrating Dataverse with added RO-Crate authoring capabilities via AROMA, CEDAR as the schema registry, and a custom search engine based on a a knowledge graph collecting RO-Crate data from ARP and data of other datasets from various Hungarian data repositories"
+title="ARP core services"
+style="width:30%; max-width:800px; display:block; margin:auto;">
+<figcaption style="text-align:center; margin-bottom: 10px;">ARP core services</figcaption>
+
+ARP is built around [Harvard's Dataverse](https://dataverse.org/). However, we found that to make ARP truly multidisciplinary,
+research communities need the ability to easily author and publish metadata schemas relevant
+to their scientific fields. While Dataverse provides metadata schemas via its metadata blocks
+and TSV input format, creating, updating, and curating these are challenging for researchers
+who are not metadata experts. To address this, we integrated [Stanford's CEDAR](https://metadatacenter.org/) as the schema authoring
+registry tool for ARP. With this integration, researchers can now easily create complex schemas
+using CEDAR’s drag-and-drop template editor and export and synchronize these with
+Dataverse, effectively enabling direct metadatablock authoring within Dataverse.
+
+Another limitation of Dataverse is that it provides only minimal metadata for the files within a
+dataset. To overcome this and enhance dataset accessibility, we introduced the Research
+Object Crate (RO-Crate) exchange format as a first-class object of ARP. We not only added
+export and import functionality for RO-Crate but also developed a complete authoring tool,
+[AROMA]({{baseurl}}{% link pages/use_cases/aroma.md %})
+, based on the RO-Crate editor component of the [Describo](https://github.com/describo/crate-builder-component) project.
+The use of RO-Crate and the integration of CEDAR schemas make it possible to associate
+metadata not only with the root dataset but also with any files and subdirectories. Users can
+define their own specific schemas in CEDAR, associate them with selected files and directories
+of their dataset in AROMA, and use these schemas to describe their data in greater depth than
+was previously possible in Dataverse.
+
+In this video we demonstrate how Dataverse, CEDAR, and RO-Crate enhance the metadata workflow of the
+Hungarian research community and how our achievements could be applied to the broader
+Dataverse community.
+
+<div style="position: relative; width: 100%; height: 0; padding-bottom: 56.25%;">
+  <iframe
+    src="https://www.youtube.com/embed/o_ENdITtIQg?si=1_c4BTG-esD04Duc"
+    title="YouTube video player"
+    style="position: absolute; top: 0; left: 0; width: 100%; height: 100%;"
+    frameborder="0"
+    allow="accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share"
+    referrerpolicy="strict-origin-when-cross-origin"
+    allowfullscreen>
+  </iframe>
+</div>
+
+