# Symbol

APP-6D / MIL-STD-2525D affiliation frames with mono track IDs.

**Consumer provides:** A 10-character SIDC in production; here an affiliation class and track ID.

```html
<span class="fdt-track"><svg class="fdt-symbol fdt-symbol--hostile">…</svg>HST-014</span>
```

- Friendly rounded rectangle, hostile diamond, neutral square, unknown quatrefoil (dashed when pending).
- Strokes lightened (`electric-400`, `hostile-300`) for 3:1 on dark grounds. Preview frames are geometric stand-ins; production renders through `<fdt-symbol>`.
- Never fuse a UI icon with a frame.