The document type is a value that represents the classification of the document processed. Below are listed the potential values and their meaning.

Type of document	Description
`TYPE_NONE`	Type of document unidentified or unrecognised.
`TYPE_CONSULAR_ID`	Identification issued by a consular office.
`TYPE_DL`	Driver's license.
`TYPE_DL_PUBLIC_SERVICES_CARD`	Public service card that also works as a driver's license.
`TYPE_EMPLOYMENT_PASS`	Labour permit issued to foreign employees.
`TYPE_FIN_CARD`	Financial Identification Card (Singapore).
`TYPE_ID`	National identity document.
`TYPE_MULTIPURPOSE_ID`	Identification document for multiple purposes.
`TYPE_MyKad`	Malaysia national identity card.
`TYPE_MyKid`	Identification card for children in Malaysia.
`TYPE_MyPR`	A permanent residence card in Malaysia.
`TYPE_MyTentera`	Military ID card in Malaysia.
`TYPE_PAN_CARD`	Tax document in India (Permanent Account Number).
`TYPE_PROFESSIONAL_ID`	Professional identification for some jobs.
`TYPE_PUBLIC_SERVICES_CARD`	Public Service Card (Ireland).
`TYPE_RESIDENCE_PERMIT`	A residence permit.
`TYPE_RESIDENT_ID`	Resident's identification.
`TYPE_TEMPORARY_RESIDENCE_PERMIT`	Temporary residence permit.
`TYPE_VOTER_ID`	Voter identification.
`TYPE_WORK_PERMIT`	Work permit.
`TYPE_iKAD`	A card for foreign workers in Malaysia.
`TYPE_MILITARY_ID`	Military identification.
`TYPE_MyKAS`	Temporary resident card in Malaysia.
`TYPE_SOCIAL_SECURITY_CARD`	Social Security Card.
`TYPE_HEALTH_INSURANCE_CARD`	Medical insurance card.
`TYPE_PASSPORT`	Standard passage.
`TYPE_S_PASS`	Work permit for trained workers (Singapore).
`TYPE_ADDRESS_CARD`	A card attesting to a residence address.
`TYPE_ALIEN_ID`	Identification for foreigners.
`TYPE_ALIEN_PASSPORT`	Passport for people without citizenship.
`TYPE_GREEN_CARD`	A permanent residence card (USA).
`TYPE_MINORS_ID`	Identification for minors.
`TYPE_POSTAL_ID`	Identification issued by the postal service.
`TYPE_PROFESSIONAL_DL`	Professional driving license.
`TYPE_TAX_ID`	Tax identification.
`TYPE_WEAPON_PERMIT`	Weapons carrier's permission.
`TYPE_VISA`	Visa of entry or stay in a country.
`TYPE_BORDER_CROSSING_CARD`	border crossing card (as BCC).
`TYPE_DRIVER_CARD`	Driver's Card (Europa).
`TYPE_GLOBAL_ENTRY_CARD`	Reliable Traveller's Card (U.S.).
`TYPE_MyPolis`	Police Identification in Malaysia.
`TYPE_NEXUS_CARD`	Fast crossing card US-Canada
`TYPE_PASSPORT_CARD`	Passenger card for sea and ground travel (USA).
`TYPE_PROOF_OF_AGE_CARD`	A card that attests to majority.
`TYPE_REFUGEE_ID`	Identification for refugees.
`TYPE_TRIBAL_ID`	Identification issued by a recognized tribe.
`TYPE_VETERAN_ID`	Identification for military veteran.
`TYPE_CITIZENSHIP_CERTIFICATE`	A citizenship certificate.
`TYPE_MY_NUMBER_CARD`	Personal number card (Japan).
`TYPE_CONSULAR_PASSPORT`	Passport issued by a consular office.
`TYPE_MINORS_PASSPORT`	Passage for minors.
`TYPE_MINORS_PUBLIC_SERVICES_CARD`	Public service card for children.