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   scalar-type as String,
   fieldname as String,
   collation as String?,
   range-value-positions as Boolean,
   [invalid-values as String]
) as element(db.rangeFieldIndex)


This function constructs a range field index specification.

scalar-type A valid type for the range index. Must be one of: int, unsignedInt, long, unsignedLong, float, double, decimal, dateTime, time, date, gYearMonth, gYear, gMonth, gDay, yearMonthDuration, dayTimeDuration, string, anyURI.
fieldname The name for the field.
collation The collation URI (for example, http://marklogic.com/collation/). The collation is only needed for string and anyURI indexes; for other indexes, specify the empty string ("") for this parameter.
range-value-positions A boolean specifying whether to maintain value positions in this index (used with co-occurrences).
invalid-values An option to handle values that do not meet the range index type. Must be one of: reject (default), ignore.


  const admin = require('/MarkLogic/admin.xqy');
  admin.databaseRangeFieldIndex("string", "fieldname",

		fn.false() )
   //returns the range field index specification 

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