| options | 
	    
    Options.  The default is ().
     
      Options include: 
      
        - "type=type"
 
        - Use the lexicon with the type specified by type
        (int, unsignedInt, long, unsignedLong, float, double, decimal,
        dateTime, time, date, gYearMonth, gYear, gMonth, gDay,
        yearMonthDuration, dayTimeDuration, string, anyURI, point, or
        long-lat-point)
 
        - "collation=URI"
 
        - Use the lexicon with the collation specified by URI.
 
        - "nullable"
 
        - Allow null values in tuples reported from cts:value-tuples when
        using this lexicon.
 
        - "unchecked"
 
        - Read the scalar type, collation and coordinate-system info
        only from the input. Do not check the definition against the
        context database.
 
        - "coordinate-system=name"
 
        - Create a reference to an index or lexicon based on the specified
         coordinate system. Allowed values: "wgs84", "wgs84/double", "raw",
         "raw/double". Only applicable if the index/lexicon value type is
         
point or long-lat-point. 
        - "precision=value"
 
        - Create a reference to an index or lexicon configured with the
         specified geospatial precision. Allowed values: 
float
         and double. Only applicable if the index/lexicon value
         type is point or long-lat-point. This
         value takes precedence over the precision implicit in the coordinate
         system name. 
       
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