ePCR API

Juvare offers application programming interfaces (APIs) to help clients and business partners optimize the interoperability of our solutions. The EMTrack ePCR API enables you to use REST and/or SOAP calls to retrieve a subset of NEMSIS v3.5.1 compliant patient data elements Fields and values as they appear in EMTrack Web and Mobile.. The API uses the FindPatient operation to retrieve this data from EMTrack.

Element Name Element Number Notes
EMS Agency Unique State ID dAgency.01 Header/DemographicGroup
EMS Agency Number dAgency.02  
EMS Agency State dAgency.04 2-digit ANSI/FIPS
Last Name ePatient.02  
First Name ePatient.03  
Middle Name ePatient.04  
Home Address ePatient.05 StreetAddress2 attribute
Home State ePatient.08 Nil value when absent
Home ZIP Code ePatient.09 Nil value when absent
Country of Residence ePatient.10 ANSI country code
Race ePatient.14 Coded (2514xxx)
Age ePatient.15  
Age Units ePatient.16 Coded (2516xxx)
Date of Birth ePatient.17  
Phone Number ePatient.18  
Email Address ePatient.19  
State Issuing Driver's License ePatient.20  
Driver's License Number ePatient.21  
Sex ePatient.25 Coded 99919xxx; Nil value when absent
Primary Method of Payment ePayment.01 Nil value when absent
Insurance Company ID ePayment.09 InsuranceGroup, only when present
Insurance Company Name ePayment.10  
Group/Plan ID ePayment.17  
Subscriber Number ePayment.18  
Primary Card Holder ePayment.19  
Triage Classification for MCI Patient eScene.08 Coded; Nil value when absent
Date/Time of Symptom Onset eSituation.01 From STEMI assessment; Nil value when absent
Chief Complaint eSituation.04 Free text; omitted when blank
Provider's Primary Impression eSituation.11 Coded; Nil value when absent
Date/Time Last Known Well eSituation.18 From stroke assessment; Nil value when absent
Medical/Surgical History eHistory.08 ICD-10-CM; repeating
Narrative eNarrative.01 Meds / procedures / notes (free text)
Date/Time Vital Signs Taken eVitals.01 Per repeating VitalGroup
SBP eVitals.06  
DBP eVitals.07  
Mean Arterial Pressure eVitals.09  
Heart Rate eVitals.10  
Pulse Oximetry eVitals.12  
Respiratory Rate eVitals.14  
EtCO2 eVitals.16 EtCO2Type="3340001" attribute when valued
Blood Glucose Level eVitals.18  
Glasgow – Eye eVitals.19  
Glasgow – Verbal eVitals.20  
Glasgow – Motor eVitals.21  
Glasgow – Qualifier eVitals.22  
Glasgow Coma Score (total) eVitals.23  
Temperature eVitals.24  
AVPU eVitals.26  
Pain Scale Score eVitals.27  
Pain Scale Type eVitals.28  
Laboratory Date/Time eLabs.01 Repeating LabGroup
Laboratory Result Type eLabs.03 NEMSIS/ICD code
Laboratory Result eLabs.04  
Estimated Body Weight in Kilograms eExam.01  
Destination/Transferred To, Name eDisposition.01  
Destination/Transferred To, Code eDisposition.02  
Destination Street Address eDisposition.03  
Destination State eDisposition.05  
Destination ZIP Code eDisposition.07  
Destination GPS Location eDisposition.09  

To successfully retrieve information from EMTrack, your web service username and password must be included in the body of the API request for authentication. The position and format for your credentials is visible in the examples below. Your web service username and password are provided by Juvare.

Parameter Description
trackingNumber Patient tracking or identification number. This number must be an exact match, but it is not case sensitive.
emsAgencyId Identification number or code (alphanumeric, up to 100 characters) for the mobile provider that entered the patient data. This number is specified in EMTrack in the Agency Number field.

Endpoint URL: https://emtrack.juvare.com/epcr/v3/epcrService/findPatient

Test Endpoint: https://emtrack.demo.juvare.com/epcr/v3/epcrService/findPatient

REST Request Example Using CURL

Copy Code 

curl -X POST \
    https://emtrack.demo.juvare.com/epcr/v3/epcrService/findPatient \
    -H 'Content-Type: text/xml' \
    -d '<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns:FindPatientRequest xmlns:ns="http://emtrack.juvare.com/ws/epcr/v3/definitions">
    <!-- Credentials provided by Juvare -->
    <username>epcr</username>
    <password>abc1234</password>
    <!-- Patient tracking number (case insensitive) -->
    <trackingNumber>patient1</trackingNumber>
    <emsAgencyId>agency1</emsAgencyId>
</ns:FindPatientRequest>'
                    

Sample Response

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<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
<ns3:FindPatientResponse xmlns:ns2="http://www.nemsis.org" xmlns:ns3="http://emtrack.juvare.com/ws/epcr/v3/definitions">
    <success>true</success>
    <patientData>
        <ns2:EMSDataSet>
            <ns2:Header>
                <ns2:DemographicGroup>
                    <ns2:dAgency.01>Springfield Fire & EMS</ns2:dAgency.01>
                    <ns2:dAgency.02>AGENCY123</ns2:dAgency.02>
                    <ns2:dAgency.04>29</ns2:dAgency.04>
                </ns2:DemographicGroup>
                <ns2:PatientCareReport UUID="f2dc9a5f-8ddf-47ed-829e-d41f30a5b3d3">
                    <ns2:ePatient>
                        <ns2:ePatient.PatientNameGroup>
                            <ns2:ePatient.02>Smith</ns2:ePatient.02>
                            <ns2:ePatient.03>John</ns2:ePatient.03>
                            <ns2:ePatient.04>A</ns2:ePatient.04>
                        </ns2:ePatient.PatientNameGroup>
                        <ns2:ePatient.05 StreetAddress2="Apt 4">123 Main St</ns2:ePatient.05>
                        <ns2:ePatient.07 NV="7701003"/>
                        <ns2:ePatient.08>25</ns2:ePatient.08>
                        <ns2:ePatient.09>12345</ns2:ePatient.09>
                        <ns2:ePatient.10>US</ns2:ePatient.10>
                        <ns2:ePatient.14>2514009</ns2:ePatient.14>
                        <ns2:ePatient.AgeGroup>
                            <ns2:ePatient.15>45</ns2:ePatient.15>
                            <ns2:ePatient.16>2516009</ns2:ePatient.16>
                        </ns2:ePatient.AgeGroup>
                        <ns2:ePatient.17>1981-01-25</ns2:ePatient.17>
                        <ns2:ePatient.18>555-123-4567</ns2:ePatient.18>
                        <ns2:ePatient.19>john.smith@example.com</ns2:ePatient.19>
                        <ns2:ePatient.20>17</ns2:ePatient.20>
                        <ns2:ePatient.21>D123-4567</ns2:ePatient.21>
                        <ns2:ePatient.25>9919003</ns2:ePatient.25>
                    </ns2:ePatient>
                    <ns2:ePayment>
                        <ns2:ePayment.01 NV="7701003"/>
                        <ns2:ePayment.InsuranceGroup>
                            <ns2:ePayment.09>INS001</ns2:ePayment.09>
                            <ns2:ePayment.10>Acme Health</ns2:ePayment.10>
                            <ns2:ePayment.17>Plan ID: PLAN1; Group ID: GRP9</ns2:ePayment.17>
                            <ns2:ePayment.18>SUB123</ns2:ePayment.18>
                            <ns2:ePayment.19>John Smith</ns2:ePayment.19>
                        </ns2:ePayment.InsuranceGroup>
                        <ns2:ePayment.50 NV="7701003"/>
                    </ns2:ePayment>
                    <ns2:eScene>
                        <ns2:eScene.01 NV="7701003"/>
                        <ns2:eScene.06 NV="7701003"/>
                        <ns2:eScene.07 NV="7701003"/>
                        <ns2:eScene.08>2708001</ns2:eScene.08>
                        <ns2:eScene.09 NV="7701003"/>
                        <ns2:eScene.18 NV="7701003"/>
                        <ns2:eScene.19 NV="7701003"/>
                        <ns2:eScene.21 NV="7701003"/>
                    </ns2:eScene>
                    <ns2:eSituation>
                        <ns2:eSituation.01>2026-01-25T08:30:00.000-06:00</ns2:eSituation.01>
                        <ns2:eSituation.02 NV="7701003"/>
                        <ns2:eSituation.PatientComplaintGroup>
                            <ns2:eSituation.04>Chest pain</ns2:eSituation.04>
                        </ns2:eSituation.PatientComplaintGroup>
                        <ns2:eSituation.07 NV="7701003"/>
                        <ns2:eSituation.08 NV="7701003"/>
                        <ns2:eSituation.09 NV="7701003"/>
                        <ns2:eSituation.11>R00.0</ns2:eSituation.11>
                        <ns2:eSituation.13 NV="7701003"/>
                        <ns2:eSituation.18 NV="7701003"/>
                        <ns2:eSituation.20 NV="7701003"/>
                    </ns2:eSituation>
                    <ns2:eHistory>
                        <ns2:eHistory.08>E10.8</ns2:eHistory.08>
                    </ns2:eHistory>
                    <ns2:eNarrative>
                        <ns2:eNarrative.01>Medications Administered:
01/25/2026 08:45 CST Aspirin 324mg
Procedures Performed:
01/25/2026 08:50 CST 12-Lead ECG
Notes:
01/25/2026 08:55 CST Patient stable By: John Smith</ns2:eNarrative.01>
                    </ns2:eNarrative>
                    <ns2:eVitals>
                        <ns2:eVitals.VitalGroup>
                            <ns2:eVitals.01>2026-01-25T09:09:43.000-06:00</ns2:eVitals.01>
                            <ns2:eVitals.02 NV="7701003"/>
                            <ns2:eVitals.BloodPressureGroup>
                                <ns2:eVitals.06>120</ns2:eVitals.06>
                                <ns2:eVitals.07>80</ns2:eVitals.07>
                                <ns2:eVitals.09>93</ns2:eVitals.09>
                            </ns2:eVitals.BloodPressureGroup>
                            <ns2:eVitals.HeartRateGroup>
                                <ns2:eVitals.10>80</ns2:eVitals.10>
                            </ns2:eVitals.HeartRateGroup>
                            <ns2:eVitals.12>98</ns2:eVitals.12>
                            <ns2:eVitals.14>16</ns2:eVitals.14>
                            <ns2:eVitals.16 ETCO2Type="3340001">40</ns2:eVitals.16>
                            <ns2:eVitals.18>100</ns2:eVitals.18>
                            <ns2:eVitals.GlasgowScoreGroup>
                                <ns2:eVitals.19>4</ns2:eVitals.19>
                                <ns2:eVitals.20>5</ns2:eVitals.20>
                                <ns2:eVitals.21>6</ns2:eVitals.21>
                                <ns2:eVitals.22 NV="7701003"/>
                                <ns2:eVitals.23>15</ns2:eVitals.23>
                            </ns2:eVitals.GlasgowScoreGroup>
                            <ns2:eVitals.TemperatureGroup>
                                <ns2:eVitals.24>36.6</ns2:eVitals.24>
                            </ns2:eVitals.TemperatureGroup>
                            <ns2:eVitals.26>3326001</ns2:eVitals.26>
                            <ns2:eVitals.PainScaleGroup>
                                <ns2:eVitals.27>3</ns2:eVitals.27>
                                <ns2:eVitals.28>3328003</ns2:eVitals.28>
                            </ns2:eVitals.PainScaleGroup>
                            <ns2:eVitals.31 NV="7701003"/>
                        </ns2:eVitals.VitalGroup>
                    </ns2:eVitals>
                    <ns2:eLabs>
                        <ns2:eLabs.LabGroup>
                            <ns2:eLabs.01>2026-01-25T09:15:00.000-06:00</ns2:eLabs.01>
                            <ns2:eLabs.LabResultGroup>
                                <ns2:eLabs.03>3403043</ns2:eLabs.03>
                                <ns2:eLabs.04>100</ns2:eLabs.04>
                            </ns2:eLabs.LabResultGroup>
                        </ns2:eLabs.LabGroup>
                    </ns2:eLabs>
                    <ns2:eExam>
                        <ns2:eExam.01>85</ns2:eExam.01>
                    </ns2:eExam>
                    <ns2:eDisposition>
                        <ns2:eDisposition.DestinationGroup>
                            <ns2:eDisposition.01>General Hospital</ns2:eDisposition.01>
                            <ns2:eDisposition.02>FAC123</ns2:eDisposition.02>
                            <ns2:eDisposition.03>500 Hospital Way</ns2:eDisposition.03>
                            <ns2:eDisposition.05>IL</ns2:eDisposition.05>
                            <ns2:eDisposition.06 NV="7701003"/>
                            <ns2:eDisposition.07>12345</ns2:eDisposition.07>
                            <ns2:eDisposition.09>41.88,-87.63</ns2:eDisposition.09>
                        </ns2:eDisposition.DestinationGroup>
                        <ns2:eDisposition.16 NV="7701003"/>
                        <ns2:eDisposition.17 NV="7701003"/>
                        <ns2:eDisposition.19 NV="7701003"/>
                        <ns2:eDisposition.21 NV="7701003"/>
                        <ns2:eDisposition.22 NV="7701003"/>
                        <ns2:eDisposition.32 NV="7701003"/>
                    </ns2:eDisposition>
                </ns2:PatientCareReport>
            </ns2:Header>
        </ns2:EMSDataSet>
    </patientData>
</ns3:FindPatientResponse>
                    

Endpoint URL: https://emtrack.juvare.com/epcr/v3/epcrService?wsdl

Test Endpoint: https://emtrack.demo.juvare.com/epcr/v3/epcrService?wsdl

SOAP Request Example Using CURL

Copy Code 

curl -X POST \
    https://emtrack.demo.juvare.com/epcr/v3/epcrService \
    -H 'Content-Type: text/xml' \
    -d '<soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/" xmlns:def="http://emtrack.juvare.com/ws/epcr/v3/definitions">
    <soapenv:Header />
    <soapenv:Body>
        <def:FindPatientRequest>
            <username>epcr</username>
            <password>abc1234</password>
            <trackingNumber>patient1</trackingNumber>
            <emsAgencyId>agency1</emsAgencyId>
        </def:FindPatientRequest>
    </soapenv:Body>
</soapenv:Envelope>'
                    

Sample Response

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<?xml version='1.0' encoding='UTF-8'?>
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
    <S:Body>
    <ns3:FindPatientResponse xmlns:ns2="http://www.nemsis.org" xmlns:ns3="http://emtrack.juvare.com/ws/epcr/v3/definitions">
    <success>true</success>
        <patientData>
        <ns2:EMSDataSet>
        <ns2:Header>
        <ns2:DemographicGroup>
        <ns2:dAgency.01>Springfield Fire & EMS</ns2:dAgency.01>
        <ns2:dAgency.02>AGENCY123</ns2:dAgency.02>
        <ns2:dAgency.04>29</ns2:dAgency.04>
    </ns2:DemographicGroup>
    <ns2:PatientCareReport UUID="f2dc9a5f-8ddf-47ed-829e-d41f30a5b3d3">
        <ns2:ePatient>
        <ns2:ePatient.PatientNameGroup>
            <ns2:ePatient.02>Smith</ns2:ePatient.02>
            <ns2:ePatient.03>John</ns2:ePatient.03>
            <ns2:ePatient.04>A</ns2:ePatient.04>
        </ns2:ePatient.PatientNameGroup>
        <ns2:ePatient.05 StreetAddress2="Apt 4">123 Main St</ns2:ePatient.05>
        <ns2:ePatient.07 NV="7701003"/>
        <ns2:ePatient.08>25</ns2:ePatient.08>
        <ns2:ePatient.09>12345</ns2:ePatient.09>
        <ns2:ePatient.10>US</ns2:ePatient.10>
        <ns2:ePatient.14>2514009</ns2:ePatient.14>
        <ns2:ePatient.AgeGroup>
            <ns2:ePatient.15>45</ns2:ePatient.15>
            <ns2:ePatient.16>2516009</ns2:ePatient.16>
        </ns2:ePatient.AgeGroup>
        <ns2:ePatient.17>1981-01-25</ns2:ePatient.17>
        <ns2:ePatient.18>555-123-4567</ns2:ePatient.18>
        <ns2:ePatient.19>john.smith@example.com</ns2:ePatient.19>
        <ns2:ePatient.20>17</ns2:ePatient.20>
        <ns2:ePatient.21>D123-4567</ns2:ePatient.21>
        <ns2:ePatient.25>9919003</ns2:ePatient.25>
    </ns2:ePatient>
    <ns2:ePayment>
        <ns2:ePayment.01 NV="7701003"/>
        <ns2:ePayment.InsuranceGroup>
            <ns2:ePayment.09>INS001</ns2:ePayment.09>
            <ns2:ePayment.10>Acme Health</ns2:ePayment.10>
            <ns2:ePayment.17>Plan ID: PLAN1; Group ID: GRP9</ns2:ePayment.17>
            <ns2:ePayment.18>SUB123</ns2:ePayment.18>
            <ns2:ePayment.19>John Smith</ns2:ePayment.19>
        </ns2:ePayment.InsuranceGroup>
        <ns2:ePayment.50 NV="7701003"/>
    </ns2:ePayment>
    <ns2:eScene>
        <ns2:eScene.01 NV="7701003"/>
        <ns2:eScene.06 NV="7701003"/>
        <ns2:eScene.07 NV="7701003"/>
        <ns2:eScene.08>2708001</ns2:eScene.08>
        <ns2:eScene.09 NV="7701003"/>
        <ns2:eScene.18 NV="7701003"/>
        <ns2:eScene.19 NV="7701003"/>
        <ns2:eScene.21 NV="7701003"/>
    </ns2:eScene>
    <ns2:eSituation>
        <ns2:eSituation.01>2026-01-25T08:30:00.000-06:00</ns2:eSituation.01>
        <ns2:eSituation.02 NV="7701003"/>
        <ns2:eSituation.PatientComplaintGroup>
            <ns2:eSituation.04>Chest pain</ns2:eSituation.04>
        </ns2:eSituation.PatientComplaintGroup>
        <ns2:eSituation.07 NV="7701003"/>
        <ns2:eSituation.08 NV="7701003"/>
        <ns2:eSituation.09 NV="7701003"/>
        <ns2:eSituation.11>R00.0</ns2:eSituation.11>
        <ns2:eSituation.13 NV="7701003"/>
        <ns2:eSituation.18 NV="7701003"/>
        <ns2:eSituation.20 NV="7701003"/>
    </ns2:eSituation>
    <ns2:eHistory>
        <ns2:eHistory.08>E10.8</ns2:eHistory.08>
    </ns2:eHistory>
    <ns2:eNarrative>
        <ns2:eNarrative.01>Medications Administered:
            01/25/2026 08:45 CST Aspirin 324mg
            Procedures Performed:
            01/25/2026 08:50 CST 12-Lead ECG
            Notes:
            01/25/2026 08:55 CST Patient stable By: John Smith</ns2:eNarrative.01>
    </ns2:eNarrative>
    <ns2:eVitals>
        <ns2:eVitals.VitalGroup>
                <ns2:eVitals.01>2026-01-25T09:09:43.000-06:00</ns2:eVitals.01>
                <ns2:eVitals.02 NV="7701003"/>
                <ns2:eVitals.BloodPressureGroup>
                    <ns2:eVitals.06>120</ns2:eVitals.06>
                    <ns2:eVitals.07>80</ns2:eVitals.07>
                    <ns2:eVitals.09>93</ns2:eVitals.09>
                </ns2:eVitals.BloodPressureGroup>
                <ns2:eVitals.HeartRateGroup>
                    <ns2:eVitals.10>80</ns2:eVitals.10>
                </ns2:eVitals.HeartRateGroup>
                <ns2:eVitals.12>98</ns2:eVitals.12>
                <ns2:eVitals.14>16</ns2:eVitals.14>
                <ns2:eVitals.16 ETCO2Type="3340001">40</ns2:eVitals.16>
                <ns2:eVitals.18>100</ns2:eVitals.18>
                <ns2:eVitals.GlasgowScoreGroup>
                    <ns2:eVitals.19>4</ns2:eVitals.19>
                    <ns2:eVitals.20>5</ns2:eVitals.20>
                    <ns2:eVitals.21>6</ns2:eVitals.21>
                    <ns2:eVitals.22 NV="7701003"/>
                    <ns2:eVitals.23>15</ns2:eVitals.23>
                </ns2:eVitals.GlasgowScoreGroup>
                <ns2:eVitals.TemperatureGroup>
                    <ns2:eVitals.24>36.6</ns2:eVitals.24>
                </ns2:eVitals.TemperatureGroup>
                <ns2:eVitals.26>3326001</ns2:eVitals.26>
                <ns2:eVitals.PainScaleGroup>
                        <ns2:eVitals.27>3</ns2:eVitals.27>
                        <ns2:eVitals.28>3328003</ns2:eVitals.28>
                    </ns2:eVitals.PainScaleGroup>
                    <ns2:eVitals.31 NV="7701003"/>
                </ns2:eVitals.VitalGroup>
                </ns2:eVitals>
                    <ns2:eLabs>
                        <ns2:eLabs.LabGroup>
                            <ns2:eLabs.01>2026-01-25T09:15:00.000-06:00</ns2:eLabs.01>
                            <ns2:eLabs.LabResultGroup>
                                <ns2:eLabs.03>3403043</ns2:eLabs.03>
                                <ns2:eLabs.04>100</ns2:eLabs.04>
                            </ns2:eLabs.LabResultGroup>
                        </ns2:eLabs.LabGroup>
                    </ns2:eLabs>
                    <ns2:eExam>
                        <ns2:eExam.01>85</ns2:eExam.01>
                    </ns2:eExam>
                    <ns2:eDisposition>
                        <ns2:eDisposition.DestinationGroup>
                            <ns2:eDisposition.01>General Hospital</ns2:eDisposition.01>
                            <ns2:eDisposition.02>FAC123</ns2:eDisposition.02>
                            <ns2:eDisposition.03>500 Hospital Way</ns2:eDisposition.03>
                            <ns2:eDisposition.05>IL</ns2:eDisposition.05>
                            <ns2:eDisposition.06 NV="7701003"/>
                            <ns2:eDisposition.07>12345</ns2:eDisposition.07>
                            <ns2:eDisposition.09>41.88,-87.63</ns2:eDisposition.09>
                        </ns2:eDisposition.DestinationGroup>
                        <ns2:eDisposition.16 NV="7701003"/>
                        <ns2:eDisposition.17 NV="7701003"/>
                        <ns2:eDisposition.19 NV="7701003"/>
                        <ns2:eDisposition.21 NV="7701003"/>
                        <ns2:eDisposition.22 NV="7701003"/>
                        <ns2:eDisposition.32 NV="7701003"/>
                    </ns2:eDisposition>
                </ns2:PatientCareReport>
            </ns2:Header>
        </ns2:EMSDataSet>
    </patientData>
</ns3:FindPatientResponse>
</S:Body>
</S:Envelope>
                    

For the sections it returns, the response represents missing data in two ways; you should treat both as "not provided":

  • NV="7701003" (Not Recorded): a NEMSIS field the interface supports but has no value for. This covers both fields the interface populates when data exists (for example, eSituation.18, eVitals.22, ePayment.01, eScene.08) and required fields the interface does not source from EMTrack at all (for example, ePatient.07; eScene.01/.06/.07/.09/.18/.19/.21; eSituation.02/.07/.08/.09/.13/.20; eVitals.02/.31; ePayment.50; eDisposition.06/.16/.17/.19/.21/.22/.32).

    In either case the NV ("Not Values") attribute is set explicitly to say why the element is empty. (XML: NV="7701003"; JSON: { "NV": "7701003" }.)

  • Omitted entirely: a NEMSIS element the interface does not populate that the schema allows it to leave out:

    • optional (minOccurs="0")

    • repeating/list-valued

    • element-reference elements

      These simply do not appear (for example, eSituation.10/.12, ePatient.06).

The difference is due to the generated NEMSIS classes declaring the mandatory single-valued elements @XmlElement(required = true, nillable = true), so an unset one must still appear (minOccurs ≥ 1). Rather than emit a bare xsi:nil="true" placeholder, which carries no reason, the interface routes every such element through its "Not Recorded" path so that it carries NV="7701003".

Optional, repeating, and element-reference fields have no such requirement and are omitted when unset.

Response Format

The endpoint returns JSON by default and XML on Accept: application/xml. The JSON variant additionally drops any null or empty ([]) properties, so absent data never appears as null. The XML variant naturally omits unset optional elements.

eHistory is an exception to this rule. eHistory is required, so empty history will appear as {}.

You should treat an NV="7701003" element and an absent element identically: no value was provided. Any residual xsi:nil="true" should likewise be treated as "not provided."