> ## Documentation Index
> Fetch the complete documentation index at: https://docs.bedrock.cv/llms.txt
> Use this file to discover all available pages before exploring further.

# Drawings

> Processed PDF drawing sets.

A Drawing is a processed PDF file — one PDF in, one Drawing out. A [Project](/guides/concepts/projects) can contain multiple Drawings (e.g., different revisions or different discipline packages).

## Processing pipeline

When you upload a drawing, Bedrock's vision pipeline processes it through several stages:

```
File (uploaded PDF)
  └─→ Drawing (created)
        └─→ Sheets (one per page)
              └─→ Blocks (detected regions)
                    └─→ Features (detected entities)
```

Each stage runs as an async job:

1. **Drawing Preprocess** — Split the PDF into individual pages, creating one [Sheet](/guides/concepts/sheets) per page.
2. **Sheet Preprocess** — Segment each Sheet into [Blocks](/guides/concepts/blocks). Detect block boundaries, classify types (Plan, Schedule, Legend, etc.), and extract title block metadata (sheet number, title, discipline).
3. **Block Preprocess** — Process each Block based on its type. For view blocks (Plan, Elevation, Section, Detail): detect [Features](/guides/concepts/features), extract grid lines, identify cross-references. For text blocks (Notes, Schedules): run OCR and extract structured content.

Poll the job status to track progress. See [Async Jobs](/vision-api/async-jobs/overview) for details.