Package com.yahoo.prelude.query

Interface TaggableItem

All Known Implementing Classes:
BoolItem, CompositeIndexedItem, CompositeTaggableItem, DotProductItem, EquivItem, ExactStringItem, FuzzyItem, GeoLocationItem, IndexedSegmentItem, IntItem, MarkerWordItem, MultiRangeItem, NearestNeighborItem, PhraseItem, PhraseSegmentItem, PredicateQueryItem, PrefixItem, RangeItem, RegExpItem, SimpleIndexedItem, SimpleTaggableItem, SubstringItem, SuffixItem, TaggableSegmentItem, TermItem, UriItem, WandItem, WeightedSetItem, WordAlternativesItem, WordItem
public interface TaggableItem
An interface used for anything which may be addressed using an external, unique ID in the query tree in the backend.
Author:
Steinar Knutsen

  • Method Details

    • getUniqueID

      int getUniqueID()

    • setUniqueID

      void setUniqueID(int id)

    • hasUniqueID

      boolean hasUniqueID()

    • setConnectivity

      void setConnectivity(Item item, double connectivity)
      Set the connectivity to another term in the same query tree. This is used to influence ranking features taking proximity into account: nativeRank and a subset of the fieldMatch features.

      By default consecutive query terms are 'somewhat' connected, meaning ranking features will score higher in documents where the terms are found close to each other. This effect can be increased or decreased by manipulating the connectivity value. Typical use is to increase the connectivity between terms in the query that we believe are semantically connected. E.g., in the query 'new york hotel', it is a good idea to increase the connectivity between "new" and "york" to ensure that a document containing "List of hotels in New York" is ranked above one containing "List of new hotels in York".

      Parameters:
      item - the item this should be connected to - in practice the previous item in the query.
      connectivity - a value between 0 (none) and 1 (maximal), defining the connectivity between this and the argument item. The default connectivity is 0.1.

    • getConnectedItem

      Item getConnectedItem()

    • getConnectivity

      double getConnectivity()

    • setSignificance

      void setSignificance(double significance)
      Used for setting explicit term significance (in the tf/idf sense) to a single term or phrase, relative to the rest of the query. This influences ranking features which take term significance into account, and overrides the default partial corpus based term significance computation in the backend.

    • hasExplicitSignificance

      boolean hasExplicitSignificance()

    • setExplicitSignificance

      void setExplicitSignificance(boolean significance)

    • getSignificance

      double getSignificance()