Named Entity Recognition Grammars Package 26.2
Named Entity Recognition Grammars User Guide

# national_id grammar

The national_id grammar is found in the sets PII, PHI.

entity | description | examples | components | checksum
--- | --- | --- | --- | ---
id/context/CC | A national identity number with context. For information about the supported ID numbers, see Supported National ID Numbers. | SSN: 111-22-3333 | ✔️ | ✓
id/landmark/CC | A national identity number landmark.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. | National insurance number Social security number | ❌ | ❌
id/nocontext/CC | A national identity number without context. For information about the supported ID numbers, see Supported National ID 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. | 111-22-3333 | ✔️ | ✓
id/redacted/context/us | A redacted or partially redacted US social security number, with context. At least one masking character, x, X, or *, must be present. | SSN: 111-xx-xxxx | ✔️ | ❌
id/redacted/nocontext/us | A redacted or partially redacted US social security number, without context. At least one masking character, x, X, or *, must be present. | 111-xx-xxxx | ❌ | ❌

The following components are produced by the above entities.

components | description | examples | context
--- | --- | --- | ---
LANDMARK | landmark indicating the entity type | رخصة قيادة | رخصة قيادة: 1234567

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 26.2 | Last updated April 2026

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Product: Named Entity Recognition Grammars Package 26.2

Topic Title: national_id grammar