Named Entity Recognition Grammars Package 26.3
Named Entity Recognition Grammars User Guide

# tin grammar

The tin grammar is found in the set PII.

entity | description | examples | components | checksum
--- | --- | --- | --- | ---
tin/context/CC | A tax identification number with context. For more examples, see Example Tax Identification Numbers.1 By default, when there are multiple possible matches, post-processing returns only one country, which is the most efficient option. You can enable ambiguous entity matching by setting ambiguous_entities=true in the pii_postprocessing.lua script. This option returns multiple possible country matches. | ITIN: 911-92-3333 TIN-numre: 101111113 | ✔️ | ✓
tin/landmark/CC | A tax identification number landmark. | ITIN TIN-numre | ❌ | ❌
tin/nocontext/CC | A tax identification number without context. For more examples, see Example Tax Identification Numbers.2 By default, when there are multiple possible matches, post-processing returns only one country, which is the most efficient option. You can enable ambiguous entity matching by setting ambiguous_entities=true in the pii_postprocessing.lua script. This option returns multiple possible country matches. | 756.3047.5009.62 Z1234567R | ✔️ | ✓
tin/vatin/context/CC | A VAT identification number with context. | NUIS: ALK99999999L VAT Reg No GB 980 7806 84 | ✔️ | ✓
tin/vatin/landmark/CC | A VAT identification number landmark. | NUIS VAT Reg No | ❌ | ❌
tin/vatin/nocontext/CC | A VAT identification number without context. | GB 980 7806 84 ALK99999999L | ✔️ | ✓

The following components are produced by the above entities.

components | description | examples | context
--- | --- | --- | ---
BUSINESS_NUMBER |  | 12302 6635 | 12302 6635 RC 0001
CODE | VAT identification number, minus the country code | U10223006 | ATU10223006
LANDMARK | landmark indicating the entity type | رخصة قيادة | رخصة قيادة: 1234567
PAN | Permanent Account Number | AAPFU0939F | 27AAPFU0939F1ZV

In the tables, ✔️ indicates that the item is always used, and ❌ that the item is never used. The ✓ symbol indicates that the item is only used for some entities (that is, for some but not all countries or languages). For details, refer to the relevant entity page.

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Version 26.3 | Last updated July 2026

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Product: Named Entity Recognition Grammars Package 26.3

Topic Title: tin grammar