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Query by Reference Index range


This query allows users to select medical web sites based upon a Reference Index range.

A Reference Index number is periodically computed for each site based upon the number of references to that site from other web sites. The Index number is equal to the number of references found to that site.


Reference Index (0-1000000)


Enter minimal desirable reference index:

Enter maximal desirable reference index:


Optionally, type keywords.

__________ ___________
How to query using Reference Indexes:
1) Enter the desired minimum and maximum reference indexes in the appropriate index fields.
2) Enter any additional keywords that you would like included in the query in the optional keyword text-field.
3) Click on the 'Run Query" button.

For example:
If you would like to query for medical sites with reference indexes between 1500 and 2000 which contain information on the heart:
1) enter 1500 in the "Enter minimal desirable references index" field
2) enter 2000 in the "Enter maximal desirable references index" field
3) enter 'heart' in the "Optionally, type keywords" field
4) press the "Run Query" button

Keywords may be combined with the above query. To do so, enter the desired keyword/s in the keyword field prior to clicking on "Run Query". This will return all resources from the combined categories which mention the keywords. See below for more details on using keywords with your queries.


Using Keywords with your Queries
  • Multiple keywords may be combined using AND, OR and NOT. The default is AND.
  • Desired phrases must be put in "double-quotes".
  • All searches are case insensitive.

Entered Keyword Combination Results Returned
heart lung all sites which mention both heart and lung
heart AND lung all sites which mention both heart and lung
heart OR lung all sites which mention either heart or lung
heart AND lung AND NOT therapy all sites which mention both heart and lung but not therapy (i.e., any sites which mention therapy will be excluded)
heart AND "Back Issues" all sites which mention both heart and the phrase "Back Issues" (case insensitive)

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