[Home](./index.md) > [@digitalpersona/core](./core.md) > [BioSampleHeader](./core.biosampleheader.md) ## BioSampleHeader class Contains meta-information about biometric sample data. Signature: ```typescript export declare class BioSampleHeader ``` ## Constructors | Constructor | Modifiers | Description | | --- | --- | --- | | [(constructor)(Factor, Format, Type, Purpose, Quality, Encryption)](./core.biosampleheader.(constructor).md) | | Constructs a new instance of the BioSampleHeader class | ## Properties | Property | Modifiers | Type | Description | | --- | --- | --- | --- | | [Encryption](./core.biosampleheader.encryption.md) | | BioSampleEncryption | Encryption of biometric sample. | | [Factor](./core.biosampleheader.factor.md) | | BioFactor | Biometric factor. Must be set to 8 for fingerprint. | | [Format](./core.biosampleheader.format.md) | | BioSampleFormat | Format owner (vendor) information. | | [Purpose](./core.biosampleheader.purpose.md) | | BioSamplePurpose | Purpose of the biometric sample. | | [Quality](./core.biosampleheader.quality.md) | | number | Quality of biometric sample. If we don't support quality it should be set to -1. | | [Type](./core.biosampleheader.type.md) | | BioSampleType | Biometric sample representation type. |