What Is NIBRS?

Characteristics of Data Elements - Number of Occurrences

The number of occurrences allowed for the NIBRS data elements yield different relationships between the elements: one-to-one, one-to-many, and many-to-many. Five of the six data segments can have multiple records. Within the records of all six data segments, some of the data elements can have only one occurrence whereas others can have multiple valid values.

For example, in the victim segment, which can have multiple victim records, each victim record can have only a single victim sequence number (data element 23) but can have multiple UCR offense codes (data element 24). In the property data segment, which can have multiple property records, each record can have multiple suspected drug types (data element 20). However, each suspected drug type can have only a single occurrence or value for estimated drug quantity (data element 21) and a single occurrence or value for type of drug measurement (data element 22).

To see the Group "A" Offense Incident and Arrest Report data elements and the number of occurrences of each, select the NIBRS data segment of interest:


OFFENSE GROUP "A" INCIDENT REPORT
ADMINISTRATIVE SEGMENT DATA ELEMENT CHARACTERISTICS

The FBI NIBRS file allows for one administrative segment record per incident report. The characteristics of the administrative segment data elements are:

No.Data ElementRequirementOccurrence(s)
1*ORI NumberMandatorySingle
2*Incident NumberMandatorySingle
3Incident Date/HourMandatorySingle
4Cleared ExceptionallyMandatorySingle
5Exceptional Clearance DateConditionalSingle

* Data elements 1 and 2 repeat for the Group "A" offenses to link all segments of an incident.

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OFFENSE GROUP "A" INCIDENT REPORT
OFFENSE SEGMENT DATA ELEMENT CHARACTERISTICS

The FBI NIBRS data file allows up to 10 separate offense segment records per incident report.
Each offense segment record has these data elements and characteristics:

No.Data ElementRequirementOccurrence(s)
1*ORI Number MandatorySingle
2*Incident NumberMandatorySingle
6 UCR Offense Code MandatorySingle
7 Offense Attempted/CompletedMandatorySingle
8 Offender(s) Suspected of Using MandatoryMultiple
8aBias MotivationMandatorySingle
9 Location TypeMandatorySingle
10Number of Premises Entered ConditionalSingle
11Method of EntryConditionalSingle
12Type Criminal Activity ConditionalMultiple
13Type Weapon/Force Involved ConditionalMultiple

* Data elements 1 and 2 are repeated to link all the segments and related segment records for one incident.

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OFFENSE GROUP "A" INCIDENT REPORT
PROPERTY SEGMENT DATA ELEMENT CHARACTERISTICS

The FBI NIBRS data file allows up to 10 separate types of property loss segment records per incident report.
Each property loss segment record has these data element and characteristics:

No.Data ElementRequirementOccurrence(s)
1* ORI NumberMandatorySingle
2* Incident Number MandatorySingle
14 Type Property Loss/etc. ConditionalSingle
15 Property Description**ConditionalMultiple
16 Value of Property ConditionalSingle
17 Date RecoveredConditionalSingle
18 Number of Stolen Motor Vehicles ConditionalSingle
19 Number of Recovered Motor VehiclesConditionalSingle
20 Suspected Drug Type***ConditionalMutiple
21 Estimated Drug Quantity ConditionalSingle
22 Type Drug Measurement ConditionalSingle

* Data elements 1 and 2 are repeated to link all the segments and related segment records for one incident.

** For each category of property description that is reported, a corresponding value of property for that category is assigned and a date recovered value is entered.

*** For each category of suspected drug type that is reported, a corresponding quantity of the drug is estimated and the type of drug measurement is recorded.

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OFFENSE GROUP "A" INCIDENT REPORT
VICTIM SEGMENT DATA ELEMENT CHARACTERISTICS

The FBI NIRBS data file allows up to 999 separate victim segment records per incident report. Each victim is assigned a unique sequential victim number (data element 23).
Each victim segment record has these characteristics:

No.Data ElementRequirementOccurrence(s)
1*ORI Number Mandatory Single
2*Incident NumberMandatory Single
23Victim (Sequence) Number Mandatory Single
24Victim Connected to UCR Offense Code(s)Mandatory Multiple
25Type of Victim Mandatory Single
26Age (of Victim)Conditional Single
27Sex (of Victim)Conditional Single
28Race (of Victim) Conditional Single
29Ethnicity (of Victim)Conditional/OptionalSingle
30Resident Status (of Victim)Conditional/OptionalSingle
31Aggravated Assault/Homicide CircumstancesConditional Multiple
32Additional Justifiable Homicide CircumstancesConditional Single
33Type InjuryConditional Multiple
34Offender Number(s) to be Related** Conditional Multiple
35Relationship(s) of Victim to Offender(s) Conditional Single

* Data elements 1 and 2 are repeated to link all the segments and related segment records for one incident.

** A unique offender sequence number identifies each offender that offended this victim. An offender can have only one relationship to this victim.

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OFFENSE GROUP "A" INCIDENT REPORT
OFFENDER SEGMENT DATA ELEMENT CHARACTERISTICS

The FBI NIBRS data file allows up to 99 separate offender segment records per incident report. Each offender is assigned a unique sequential offender number (data element 36).
Each offender segment record has these characteristics:

No.Data ElementRequirementOccurrence(s)
1* ORI Number Mandatory Single
2* Incident NumberMandatory Single
36 Offender (Sequence) Number Mandatory Single
37 Age (of Offender)Mandatory Single
38 Sex (of Offender)Mandatory Single
39 Race (of Offender) Mandatory Single

* Data elements 1 and 2 are repeated to link all the segments related to one incident.

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OFFENSE GROUP "A" INCIDENT REPORT
ARRESTEE SEGMENT DATA ELEMENT CHARACTERISTICS

The FBI NIBRS data file allows up to 99 separate arrestee segment records per incident report. Each arrestee is assigned a unique sequential arrestee number (data element 40).
Each arrestee segment record has these characteristics:

No.Data ElementRequirementOccurrence(s)
1*ORI NumberMandatorySingle
2*Incident Number MandatorySingle
40Arrestee (Sequence) NumberMandatorySingle
41Arrest (Transaction) Number MandatorySingle
42Arrest Date MandatorySingle
43Type of ArrestMandatorySingle
44Multiple Arrestee Segments IndicatorMandatorySingle
45UCR Arrest Offense Code MandatorySingle
46Arrestee Was Armed With MandatoryMultiple
47Age (of Arrestee) MandatorySingle
48Sex (of Arrestee) MandatorySingle
49Race (of Arrestee)MandatorySingle
50Ethnicity (of Arrestee) Optional Single
51Resident Status (of Arrestee) Optional Single
52Disposition of Arrestee Under 18ConditionalSingle

* Data elements 1 and 2 are repeated to link all the segments related to one incident.

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