vigyasharma commented on PR #13525:
URL: https://github.com/apache/lucene/pull/13525#issuecomment-2487589088
> My concern is that this proposal doesn’t truly add support for
independent multi-vectors.
That's a valid concern. I've been thinking about a more comprehensive
multi-vector solution. Sharing some raw thoughts below, would love to get
feedback.
We support a default aggregation value of `NONE`, which builds the graph
with independent multi-vectors. Each node will be a separate vector value. As a
first change, we can just support this without creating an aggregation enum.
(Adding a plan for indexing this in a follow-up comment).
Once this is in place, we can add support for "dependent" multi-vector
values like ColBERT. They'll take an aggregation function. Each graph node will
represent all vectors for a document and use aggregated similarity (like in
this PR). This will let us experiment with full ANN on ColBERT style
multi-vectors.
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