FAQ
NLM LocatorPlus -- Relevance in Keyword Anywhere Searches

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• - Relevance is based on a combination of factors:
  
  
  • - how many of your keywords appear - if you enter five keywords, titles with all five of these words will be considered more relevant than titles that only have three of the keywords.
    
    
  • - where in the record the keywords appear - if a keyword is in the Subject field of a record, it is given higher relevance than if a keyword is in the Notes field of a record.
    
    
• The system will return up to 10,000 titles in your search results, and rank them according to relevance. Avoid doing a one-word search that would find more than 10,000 titles, because you may miss some relevant results (Title 10,001 could be very relevant).
  
  
• The chart below shows how the keywords in different fields are weighted for determining relevance. The higher the number under "Weight," the greater the relevance.
  Weighting Values for Keyword Fields

  Field/Subfield	Weight	MARC Definition
  100a	200	Personal Name
  100q	200	Fuller Form of Name
  110a	200	Corporate Name
  110b	200	Subordinate Unit
  111a	200	Meeting Name
  111e	200	Subordinate Unit
  111q	200	Name of Meeting Following Jurisdiction Name Entry Element
  210a	200	Title Abbreviation
  245a	500	Title Statement
  245b	500	Title Statement - Remainder of Title
  246a	240	Title - Varying Form
  260a	20	Place of Publication
  260b	20	Name of Publisher
  261f	20	Place of Production (pre-AACR1)
  262a	20	Place of Production (pre-AACR2)
  269a	20	Current Place of Publication
  269b	20	Current Name of Publisher
  440a	200	Series Title - Title Added Entry
  490a	200	Series Title - No Added Entry
  505a	200	Formatted Contents Note
  510a	20	Abstract & Indexing Services
  521a	20	Target Audience Note
  533b	20	Reproduction Note - Place of Reproduction
  533c	20	Reproduction Note - Agency Responsible for Reproduction
  536a	20	Funding Information Note
  555a	20	Cumulative Index/Finding Aids Note
  555d	20	Cumulative Index/Finding Aids Bibliographic Ref. Note
  581a	20	Publications About Described Materials Note
  600a	200	Subject Added Entry - Personal Name
  600p	200	Subject Added Entry - Personal Name -Name Part/Section of Work
  600q	200	Subject Added Entry - Personal Name - Fuller Form of Name
  600t	200	Subject Added Entry - Personal Name - Title of Work
  610a	200	Subject Added Entry - Corporate Name
  610b	200	Subject Added Entry - Corporate Name - Subordinate Unit
  610p	200	Subject Added Entry - Corporate Name - Name Part/Section
  610t	200	Subject Added Entry - Corporate Name - Title of Work
  611a	200	Subject Added Entry - Meeting Name
  611e	200	Subject Added Entry - Meeting Name - Subordinate Unit
  611q	200	Subject Added Entry - Meeting Name - Name of meeting follow. juris.
  630a	200	Subject Added Entry - Uniform Title
  630p	200	Subject Added Entry - Uniform Title - Name Part/Section of Work
  630t	200	Subject Added Entry - Uniform Title - Title of Work
  650a	200	Subject Added Entry - Topical
  650b	20	Subject Added Entry - Topical - Following Geographic Name
  650x	200	Subject Added Entry - Topical - General Subdivision
  650z	20	Subject Added Entry - Topical - Geographic Subdivision
  651a	200	Subject Added Entry - Geographic Name
  651x	200	Subject Added Entry - Geographic Name - General Subdivision
  651z	20	Subject Added Entry - Geographic Name - Geographic Subdivision
  653a	200	Index Term Uncontrolled
  655a	200	Index Term - Genre/Form
  695a	200	HMD Subject Headings - Topical
  695x	200	HMD Subject Headings - Topical - General Subdivision
  695y	20	HMD Subject Headings - Topical - Chronological Subdivision
  695z	20	HMD Subject Headings - Topical - Geographic Subdivision
  698a	200	LJI Subject Headings
  700a	200	Added Entry - Personal Name
  700q	200	Added Entry - Personal Name - Fuller Form of Name
  700t	240	Added Entry - Personal Name - Title of Work
  710a	200	Added Entry - Corporate Name
  710b	200	Added Entry - Corporate Name - Subordinate Unit
  710t	240	Added Entry - Corporate Name - Title of Work
  711a	200	Added Entry - Meeting Name
  711c	200	Added Entry - Meeting Name - Location of Meeting
  711e	200	Added Entry - Meeting Name - Subordinate Unit
  711q	200	Added Entry - Meeting Name - Name of Meeting Follow. Jursid.
  711t	240	Added Entry - Meeting Name - Title of Work
  856u	200	Electronic Location - URL

  
  

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Last reviewed: 14 July 2008
Last updated: 13 July 2007
First published: 01 January 1998
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