Duplicate Resources with Same OMID Returning Different Metadata

[arcangelo7]

I have encountered an issue with the OpenCitations Meta API that appears to return duplicate resources for the same OMID, each with slightly different metadata. This issue undermines the expectation that an OMID is a unique identifier for a single resource.

Specifically, the API call to:

https://opencitations.net/meta/api/v1/metadata/omid:br/06140765462

returns two different resources with the same OMID but with variations in their metadata.

[arcangelo7]

After investigating the problem, we have determined that the two resources returned by the API are indeed the same entity. The issue arises because some properties, such as the date, are duplicated, which results in the API treating them as two separate resources.

This duplication of properties occurred due to an error during the merging process of entities that shared at least one common ID. We acknowledge the problem and will work on a solution to correctly merge these entities and eliminate the duplicate properties.