# Rule: Do Not Expand Initials Without Source Verification

**Created:** 2025-12-28
**Status:** ACTIVE
**Priority:** HIGH

## Rule Statement

**NEVER expand initials to full first names unless the source document explicitly provides the full name.**

## Background

When sources list names with initials (e.g., "Dr. K.J.P.F.M. Jeurgens"), you MUST NOT guess or assume what those initials stand for. "K." could be Karel, Klaas, Kees, Karsten, Koen, etc.

## Examples

### FORBIDDEN

```json
// Source says: "Dr. K.J.P.F.M. Jeurgens"
// WRONG - Do not assume initials
{
  "foaf:name": "Charles Jeurgens",  // FORBIDDEN - "K" is not "Charles"
  "foaf:full_name_formal": "Dr. K.J.P.F.M. Jeurgens"
}
```

### CORRECT

```json
// Source says: "Dr. K.J.P.F.M. Jeurgens"
// CORRECT - Preserve initials as given
{
  "foaf:name": "K.J.P.F.M. Jeurgens",
  "foaf:title": "Dr.",
  "foaf:full_name_formal": "Dr. K.J.P.F.M. Jeurgens",
  "notes": "First names represented by initials only; full names not provided in source"
}
```

### CORRECT (when source provides full name)

```json
// Source says: "Dr. Karel Jan Jeurgens (K.J.P.F.M. Jeurgens)"
// CORRECT - Source explicitly provides full names
{
  "foaf:name": "Karel Jan Jeurgens",
  "foaf:title": "Dr.",
  "foaf:full_name_formal": "Dr. K.J.P.F.M. Jeurgens",
  "web_claims": [
    {
      "claim_type": "full_name_expansion",
      "claim_value": "Karel Jan",
      "source_url": "https://example.org/staff",
      "xpath": "...",
      "notes": "Full first names explicitly stated in source"
    }
  ]
}
```

## Implementation

1. **foaf:name**: Use the name EXACTLY as it appears in the source
2. **foaf:title**: Extract academic/honorific titles (Dr., Drs., Prof., Jhr., etc.)
3. **foaf:full_name_formal**: Include complete formal name with titles and initials as given
4. **notes**: Add note when initials are not expanded

## Verification Required

Before expanding any initial:
1. Check if the source document provides the full name
2. Search for other authoritative sources (LinkedIn, institutional pages)
3. If no explicit full name is found, preserve initials

## Related Rules

- DATA_FABRICATION_PROHIBITION.md - Real data only
- PERSON_DATA_PROVENANCE_RULE.md - All claims need provenance