add wega-oai idea

_gsoc/wega-oai.md

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+---
+title: Develop an OAI-PMH API for the WeGA-WebApp 
+mentors:  
+  - name: Peter
+    github: peterstadler
+  - name: Dennis
+    github: riedde
+skills: 
+  - XQuery
+  - XML
+  - REST APIs
+forum: https://chat.edirom.de/gsoc
+est_project_length: 350 hours
+difficulty: medium
+---
+
+The [WeGA-WebApp] drives the publication of the digital edition of 
+Carl Maria von Weber's letters, diaries and writings–and much more. 
+While there are already various interfaces to interact with the WeGA-WebApp an 
+[OAI-PMH] (Open Archives Initiative Protocol for Metadata Harvesting) API 
+is still missing.
+Because the OAI-PMH standard is a widely-used protocol that allows 
+repositories to expose structured metadata for harvesting by external 
+institutions, it is a cornerstone for integrating digital resources into global 
+research networks.
+The API should provide endpoints for common OAI-PMH verbs, such as 
+`Identify`, `ListMetadataFormats`, `ListIdentifiers`, `ListRecords`, and 
+`GetRecord`, enabling granular access to the metadata from the WeGA-WebApp.
+This would significantly enhance the accessibility, interoperability, and 
+discoverability of all digital editions served by the WeGA-WebApp, enabling 
+the project to reach larger academic and cultural audiences. 
+
+The task is to get acquainted with the OAI-PMH standard and the required API 
+endpoints, and to implement this in XQuery. 
+You can build on the already established Linked Data and Dublin Core 
+interfaces of the WeGA-WebApp, and its existing [Swagger OpenAPI].
+The existing Dublin Core metadata interface provides a solid foundation for 
+defining the metadata exposure required by OAI-PMH, while the Linked Data 
+interface may inform URI structures. 
+The Swagger OpenAPI can guide the integration of OAI-PMH endpoints within 
+the broader API ecosystem of the WeGA-WebApp.
+The task should also include testing the implementation for compliance with 
+the OAI-PMH standard and documenting the API endpoints, including their 
+functionality and expected parameters, for internal and external users.
+
+[WeGA-WebApp]: https://github.com/Edirom/WeGA-WebApp
+[OAI-PMH]: https://www.openarchives.org/pmh/
+[Swagger OpenAPI]: https://www.weber-gesamtausgabe.de/api/v1/index.html