Hello Hibernate Search Developers,

Thank you for developing hibernate search! I have been using it with the Lucene backend for a few months now and it has worked like a charm.

I am currently trying to implement a dense passage retrieval system and i am evaluating whether i can use Hibernate search for that purpose. Essentially I want to perform a knn search on Entities that have multiple Embeddings associated with them.

Consider something like this:

This is currently not possible as stated in the documentation:

“It is not allowed to index multiple vectors within the same field, i.e. vector fields cannot be multivalued.“

Is this a temporary limitation because the vector search functionality is currently being developed or are there any underlying limitations that make this impossible to implement?

Thank you for your help!