# Vector-similarity search (VSS) algorithms in Neptune Analytics
<a name="vss-algorithms"></a>

Vector similarity search algorithms identify similar vectors based on the vector distance between them.

Neptune Analytics supports the following vector-similarity search algorithms:

**Note**  
The following special floating-point values are not supported in Neptune Analytics vector-similarity search algorithms:  
**INF**  (infinity)
**-INF**  (negative infinity)
**NaN**  (not-a-number)

**Contents**
+ [The  `.vectors.distance`  algorithm (deprecated)](vectors-distance.md)
  + [`.vectors.distance`  syntax](vectors-distance.md#vectors-distance-syntax)
  + [`.vectors.distance`  inputs](vectors-distance.md#vectors-distance-inputs)
  + [`.vectors.distance`  outputs](vectors-distance.md#vectors-distance-outputs)
  + [`.vectors.distance`  query examples](vectors-distance.md#vectors-distance-query-example)
  + [Sample  `.vectors.distance`  output](vectors-distance.md#vectors-distance-sample-output)
+ [The  `.vectors.distance.byNode`  algorithm](vectors.distance.byNode.md)
  + [`.vectors.distance.byNode`  syntax](vectors.distance.byNode.md#vectors.distance.byNode-syntax)
  + [`.vectors.distance.byNode`  inputs](vectors.distance.byNode.md#vectors.distance.byNode-inputs)
  + [`.vectors.distance.byNode`  outputs](vectors.distance.byNode.md#vectors.distance.byNode-outputs)
  + [`.vectors.distance.byNode`  query examples](vectors.distance.byNode.md#vectors.distance.byNode-query-example)
  + [Sample  `.vectors.distance.byNode`  output](vectors.distance.byNode.md#vectors.distance.byNode-sample-output)
+ [The  `.vectors.distanceByEmbedding`  algorithm (deprecated)](vectors-distance-embedding.md)
  + [`.vectors.distanceByEmbedding`  syntax](vectors-distance-embedding.md#vectors-distance-embedding-syntax)
  + [`.vectors.distanceByEmbedding`  inputs](vectors-distance-embedding.md#vectors-distance-embedding-inputs)
  + [`.vectors.distanceByEmbedding`  outputs](vectors-distance-embedding.md#vectors-distance-embedding-outputs)
  + [`.vectors.distanceByEmbedding`  query examples](vectors-distance-embedding.md#vectors-distance-embedding-query-example)
  + [Sample  `.vectors.distanceByEmbedding`  output](vectors-distance-embedding.md#vectors-distance-embedding-sample-output)
+ [The  `.vectors.distance.byEmbedding`  algorithm](vectors.distance.byEmbedding.md)
  + [`.vectors.distance.byEmbedding`  syntax](vectors.distance.byEmbedding.md#vectors.distance.byEmbedding-syntax)
  + [`.vectors.distance.byEmbedding`  inputs](vectors.distance.byEmbedding.md#vectors.distance.byEmbedding-inputs)
  + [`.vectors.distance.byEmbedding`  outputs](vectors.distance.byEmbedding.md#vectors.distance.byEmbedding-outputs)
  + [`.vectors.distance.byEmbedding`  query examples](vectors.distance.byEmbedding.md#vectors.distance.byEmbedding-query-example)
  + [Sample  `.vectors.distance.byEmbedding`  output](vectors.distance.byEmbedding.md#vectors.distance.byEmbedding-sample-output)
+ [The  `.vectors.get`  algorithm](vectors-get.md)
  + [`.vectors.get`  syntax](vectors-get.md#vectors-get-syntax)
  + [`.vectors.get`  input](vectors-get.md#vectors-get-inputs)
  + [`.vectors.get`  outputs](vectors-get.md#vectors-get-outputs)
  + [`.vectors.get`  query example](vectors-get.md#vectors-get-query-example)
  + [Sample  `.vectors.get`  output](vectors-get.md#vectors-get-sample-output)
+ [.vectors.topKByEmbedding algorithm (deprecated)](vectors-topKByEmbedding.md)
  + [`.vectors.topKByEmbedding`  syntax](vectors-topKByEmbedding.md#vectors-topKByEmbedding-syntax)
  + [`.vectors.topKByEmbedding`  input](vectors-topKByEmbedding.md#vectors-topKByEmbedding-inputs)
  + [`.vectors.topKByEmbedding`  outputs](vectors-topKByEmbedding.md#vectors-topKByEmbedding-outputs)
  + [`.vectors.topKByEmbedding`  query example](vectors-topKByEmbedding.md#vectors-topKByEmbedding-query-example)
  + [Sample  `.vectors.topKByEmbedding`  output](vectors-topKByEmbedding.md#vectors-topKByEmbedding-sample-output)
+ [.vectors.topK.byEmbedding algorithm](vectors.topK.byEmbedding.md)
  + [`.vectors.topK.byEmbedding`  syntax](vectors.topK.byEmbedding.md#vectors.topK.byEmbedding-syntax)
  + [`.vectors.topK.byEmbedding`  input](vectors.topK.byEmbedding.md#vectors.topK.byEmbedding-inputs)
  + [`.vectors.topK.byEmbedding`  outputs](vectors.topK.byEmbedding.md#vectors.topK.byEmbedding-outputs)
  + [`.vectors.topK.byEmbedding`  query example](vectors.topK.byEmbedding.md#vectors.topK.byEmbedding-query-example)
  + [Sample  `.vectors.topKByEmbedding`  output](vectors.topK.byEmbedding.md#vectors-topKByEmbedding-sample-output)
+ [.vectors.topKByNode algorithm (deprecated)](vectors-topKByNode.md)
  + [`.vectors.topKByNode`  syntax](vectors-topKByNode.md#vectors-topKByNode-syntax)
  + [`.vectors.topKByNode`  input](vectors-topKByNode.md#vectors-topKByNode-inputs)
  + [`.vectors.topKByNode`  outputs](vectors-topKByNode.md#vectors-topKByNode-outputs)
  + [`.vectors.topKByNode`  query example](vectors-topKByNode.md#vectors-topKByNode-query-example)
  + [Sample  `.vectors.topKByNode`  output](vectors-topKByNode.md#vectors-topKByNode-sample-output)
+ [.vectors.topK.byNode algorithm](vectors.topK.byNode.md)
  + [`.vectors.topK.byNode`  syntax](vectors.topK.byNode.md#vectors.topK.byNode-syntax)
  + [`.vectors.topK.byNode`  input](vectors.topK.byNode.md#vectors.topK.byNode-inputs)
  + [`.vectors.topK.byNode`  outputs](vectors.topK.byNode.md#vectors.topK.byNode-outputs)
  + [`.vectors.topK.byNode`  query example](vectors.topK.byNode.md#vectors.topK.byNode-query-example)
  + [Sample  `.vectors.topK.byNode`  output](vectors.topK.byNode.md#vectors.topK.byNode-sample-output)
+ [.vectors.upsert algorithm](vectors-upsert.md)
  + [`.vectors.upsert`  syntax](vectors-upsert.md#vectors-upsert-syntax)
  + [`.vectors.upsert`  input](vectors-upsert.md#vectors-upsert-inputs)
  + [`.vectors.upsert`  outputs](vectors-upsert.md#vectors-upsert-outputs)
  + [`.vectors.upsert`  query examples](vectors-upsert.md#vectors-upsert-query-example)
  + [Sample  `.vectors.upsert`  output](vectors-upsert.md#vectors-upsert-sample-output)
+ [.vectors.remove algorithm](vectors-remove.md)
  + [`.vectors.remove`  syntax](vectors-remove.md#vectors-remove-syntax)
  + [`.vectors.remove`  input](vectors-remove.md#vectors-remove-inputs)
  + [`.vectors.remove`  outputs](vectors-remove.md#vectors-remove-outputs)
  + [`.vectors.remove`  query examples](vectors-remove.md#vectors-remove-query-example)
  + [Sample  `.vectors.remove`  output](vectors-remove.md#vectors-remove-sample-output)