# 2.3. Data Sources

#### Primary Knowledge Base: Official Filings

* **Coverage**: 50,000+ global public companies
* **Document Types**:
  * Annual Reports (10-K, 20-F)
  * Quarterly Reports (10-Q)
  * Current Reports (8-K)
  * Proxy Statements
  * Registration Statements
  * Industry-specific regulatory filings

#### Data Characteristics

* **Update Frequency**: Daily updates
* **Historical Depth**: 12-month rolling period
* **Data Quality**:
  * 99%+ parsing accuracy
  * Table extraction with structure preservation
  * Financial statement standardization
  * Cross-document entity linking

#### Exclusions

* Broker research reports
* News articles
* Social media content
* Unofficial sources
* Third-party analysis


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