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

# Six Tags

> Every subject has a one-character type prefix. Prevents injection. Enables parsing.

| Tag | Type      | Examples                                        |
| --- | --------- | ----------------------------------------------- |
| `$` | Financial | `$BTC` `$ETF.IBIT` `$SPY` `$funding_rate`       |
| `@` | Entity    | `@whale.CW2024` `@agent.WHL-01` `@patient.7291` |
| `#` | Metric    | `#RSI` `#MACD` `#CA125` `#p_value`              |
| `!` | Event     | `!rate_hike` `!whale_move` `!earthquake`        |
| `~` | State     | `~fear` `~oversold` `~consensus` `~remission`   |
| `^` | Value     | `^70200` `^-4.2%` `^0.72` `^3.5x`               |

## Composition

Chain tagged values with `+` in evidence fields:

```
<-$whale_flow+$funding_neg+~oversold
```

The parser reads each `+` segment, checks the prefix, types the value. A `$`-tagged field is always financial. Type prefix prevents injection.

## Cross-Domain

| Domain   | \$          | @               | #         | !            | \~           | ^      |
| -------- | ----------- | --------------- | --------- | ------------ | ------------ | ------ |
| Finance  | \$BTC       | @whale.CW       | #RSI      | !rate\_hike  | \~oversold   | ^70200 |
| Medicine | \$procedure | @patient.7291   | #CA125    | !biopsy      | \~remission  | ^4.2x  |
| Military | \$budget    | @unit.3rd\_army | #distance | !invasion    | \~hostile    | ^150km |
| Science  | \$grant     | @author.smith   | #p\_value | !publication | \~replicable | ^0.42  |