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XQuery vec:base64-encode

MarkLogic 12 EA 1 Product Documentation
vec.base64Encode

vec.base64Encode(
   vector1 as vec.vector
) as String

Summary

Returns the base64 encoding of the vector. Useful for compressing a high-dimensional float vector represented as a string into fewer characters.

Parameters
vector1 The vector to base64 encode.

See Also

Example

  const vec1 = vec.vector([3.14,1.59,2.65])
  vec.base64Encode(vec1)

  => FYT6NiFJhGw=AwAAAA==AAAAAA==w/VIQB+Fyz+amSlA

Example

  const vec1 = vec.vector(xdmp.toJSON(fn.doc('pronethalol.json')).xpath('/data/array-node{embedding}'))
  String(vec.base64Encode(vec1).length).concat(" VS ").concat(String(vec1).length);

  => 8220 VS 18231
  // This function compressed the string representation of the 1536 dimensional float vector
  //   in 'pronethalol.json' at array node 'embedding'
  //   from 18231 characters to 8220 characters.

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