---
Source: https://docs.microblink.com/blinkid/extract-fields
Title: Extract specific fields
Description: Access name, date of birth, document number, expiry, address, and other fields from BlinkID scanning results
---
# Extract specific fields
The top-level result object contains aggregated fields extracted from all scanned sides of the document.
All fields are optional—the SDK only populates what it can read from the document.
Always check whether a field is present before using its value.
## Name fields
```typescript
blinkId.addOnResultCallback((result) => {
console.log("First name:", result.firstName?.latin?.value);
console.log("Last name:", result.lastName?.latin?.value);
console.log("Full name:", result.fullName?.latin?.value);
void blinkId.destroy();
});
```
```kotlin
onScanningSuccess = { result ->
println("First name: ${result.firstName?.value}")
println("Last name: ${result.lastName?.value}")
println("Full name: ${result.fullName?.value}")
}
```
```swift
onScanCompleted: { resultState in
guard let result = resultState.scanningResult else { return }
print("First name:", result.firstName?.value ?? "")
print("Last name:", result.lastName?.value ?? "")
print("Full name:", result.fullName?.value ?? "")
}
```
## Date of birth
Date fields carry both a structured representation (year, month, day) and the original string as it appeared on the document.
```typescript
blinkId.addOnResultCallback((result) => {
const dob = result.dateOfBirth;
if (dob) {
console.log("Year:", dob.year);
console.log("Month:", dob.month);
console.log("Day:", dob.day);
console.log("Original string:", dob.originalString?.latin?.value);
}
void blinkId.destroy();
});
```
```kotlin
onScanningSuccess = { result ->
result.dateOfBirth?.let { dob ->
println("Year: ${dob.year}")
println("Month: ${dob.month}")
println("Day: ${dob.day}")
println("Original string: ${dob.originalString?.value}")
}
}
```
```swift
onScanCompleted: { resultState in
guard let result = resultState.scanningResult else { return }
if let dob = result.dateOfBirth {
print("Year:", dob.year as Any)
print("Month:", dob.month as Any)
print("Day:", dob.day as Any)
print("Original string:", dob.originalString?.value ?? "")
}
}
```
## Document number and expiry
```typescript
blinkId.addOnResultCallback((result) => {
console.log("Document number:", result.documentNumber?.latin?.value);
const expiry = result.dateOfExpiry;
if (expiry) {
console.log("Expiry year:", expiry.year);
console.log("Expiry month:", expiry.month);
console.log("Expiry day:", expiry.day);
}
console.log("Permanent:", result.dateOfExpiryPermanent);
void blinkId.destroy();
});
```
```kotlin
onScanningSuccess = { result ->
println("Document number: ${result.documentNumber?.value}")
result.dateOfExpiry?.let { expiry ->
println("Expiry year: ${expiry.year}")
println("Expiry month: ${expiry.month}")
println("Expiry day: ${expiry.day}")
}
println("Permanent: ${result.dateOfExpiryPermanent}")
}
```
```swift
onScanCompleted: { resultState in
guard let result = resultState.scanningResult else { return }
print("Document number:", result.documentNumber?.value ?? "")
if let expiry = result.dateOfExpiry {
print("Expiry year:", expiry.year as Any)
print("Expiry month:", expiry.month as Any)
print("Expiry day:", expiry.day as Any)
}
print("Permanent:", result.dateOfExpiryPermanent as Any)
}
```
## Address
```typescript
blinkId.addOnResultCallback((result) => {
console.log("Address:", result.address?.latin?.value);
console.log("Additional address:", result.additionalAddressInformation?.latin?.value);
void blinkId.destroy();
});
```
```kotlin
onScanningSuccess = { result ->
println("Address: ${result.address?.value}")
println("Additional address: ${result.additionalAddressInformation?.value}")
}
```
```swift
onScanCompleted: { resultState in
guard let result = resultState.scanningResult else { return }
print("Address:", result.address?.value ?? "")
print("Additional address:", result.additionalAddressInformation?.value ?? "")
}
```
## Nationality, sex, and ethnicity
```typescript
blinkId.addOnResultCallback((result) => {
console.log("Nationality:", result.nationality?.latin?.value);
console.log("Sex:", result.sex?.latin?.value);
console.log("Ethnicity:", result.ethnicity?.latin?.value);
void blinkId.destroy();
});
```
```kotlin
onScanningSuccess = { result ->
println("Nationality: ${result.nationality?.value}")
println("Sex: ${result.sex?.value}")
println("Ethnicity: ${result.ethnicity?.value}")
}
```
```swift
onScanCompleted: { resultState in
guard let result = resultState.scanningResult else { return }
print("Nationality:", result.nationality?.value ?? "")
print("Sex:", result.sex?.value ?? "")
print("Ethnicity:", result.ethnicity?.value ?? "")
}
```
## Related articles
- [How to parse document class info](parse-document-class-info.md)
- [How to scan a single-sided document](scan-single-side.md)
- [How to scan a double-sided document](scan-double-side.md)
- [How to scan a passport](scan-passport.md)
- [How to scan from a static image](scan-image.md)
Last updated on Jul 28, 2026