Package org.apache.lucene.codecs.lucene53

Class Lucene53NormsFormat

  • public class Lucene53NormsFormat
extends NormsFormat
    Lucene 5.3 Score normalization format.

    Encodes normalization values by encoding each value with the minimum number of bytes needed to represent the range (which can be zero).

    Files:

    1. .nvd: Norms data
    2. .nvm: Norms metadata

    1. The Norms metadata or .nvm file.

      For each norms field, this stores metadata, such as the offset into the Norms data (.nvd)

      Norms metadata (.dvm) --> Header,<Entry>NumFields,Footer

      FieldNumber of -1 indicates the end of metadata.

      Offset is the pointer to the start of the data in the norms data (.nvd), or the singleton value when BytesPerValue = 0

    2. The Norms data or .nvd file.

      For each Norms field, this stores the actual per-document data (the heavy-lifting)

      Norms data (.nvd) --> Header,< Data >NumFields,Footer

    WARNING: This API is experimental and might change in incompatible ways in the next release.